{"url":"http://public2.vulnerablecode.io/api/packages/692396?format=json","purl":"pkg:pypi/urllib3@2.2.1","type":"pypi","namespace":"","name":"urllib3","version":"2.2.1","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"2.6.3","latest_non_vulnerable_version":"2.7.0","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/18564?format=json","vulnerability_id":"VCID-5tkp-pxz9-h7c2","summary":"urllib3's Proxy-Authorization request header isn't stripped during cross-origin redirects\nWhen using urllib3's proxy support with `ProxyManager`, the `Proxy-Authorization` header is only sent to the configured proxy, as expected.\n\nHowever, when sending HTTP requests *without* using urllib3's proxy support, it's possible to accidentally configure the `Proxy-Authorization` header even though it won't have any effect as the request is not using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn't treat the `Proxy-Authorization` HTTP header as one carrying authentication material and thus doesn't strip the header on cross-origin redirects.\n\nBecause this is a highly unlikely scenario, we believe the severity of this vulnerability is low for almost all users. Out of an abundance of caution urllib3 will automatically strip the `Proxy-Authorization` header during cross-origin redirects to avoid the small chance that users are doing this on accident.\n\nUsers should use urllib3's proxy support or disable automatic redirects to achieve safe processing of the `Proxy-Authorization` header, but we still decided to strip the header by default in order to further protect users who aren't using the correct approach.\n\n## Affected usages\n\nWe believe the number of usages affected by this advisory is low. It requires all of the following to be true to be exploited:\n\n* Setting the `Proxy-Authorization` header without using urllib3's built-in proxy support.\n* Not disabling HTTP redirects.\n* Either not using an HTTPS origin server or for the proxy or target origin to redirect to a malicious origin.\n\n## Remediation\n\n* Using the `Proxy-Authorization` header with urllib3's `ProxyManager`.\n* Disabling HTTP redirects using `redirects=False` when sending requests.\n* Not using the `Proxy-Authorization` header.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-37891.json","reference_id":"","reference_type":"","scores":[{"value":"4.4","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-37891.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-37891","reference_id":"","reference_type":"","scores":[{"value":"0.00216","scoring_system":"epss","scoring_elements":"0.44006","published_at":"2026-05-14T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.49016","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48924","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48978","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48975","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48992","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48966","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48973","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.4902","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49702","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49581","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49674","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49666","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49709","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.497","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.4971","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49643","published_at":"2026-05-12T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49616","published_at":"2026-05-11T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.49667","published_at":"2026-05-09T12:55:00Z"},{"value":"0.00263","scoring_system":"epss","scoring_elements":"0.4964","published_at":"2026-05-07T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-37891"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-37891","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-37891"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"4.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/urllib3/urllib3","reference_id":"","reference_type":"","scores":[{"value":"4.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/urllib3/urllib3"},{"reference_url":"https://github.com/urllib3/urllib3/commit/40b6d1605814dd1db0a46e202d6e56f2e4c9a468","reference_id":"","reference_type":"","scores":[{"value":"4.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/urllib3/urllib3/commit/40b6d1605814dd1db0a46e202d6e56f2e4c9a468"},{"reference_url":"https://github.com/urllib3/urllib3/commit/accff72ecc2f6cf5a76d9570198a93ac7c90270e","reference_id":"","reference_type":"","scores":[{"value":"4.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-18T13:49:45Z/"}],"url":"https://github.com/urllib3/urllib3/commit/accff72ecc2f6cf5a76d9570198a93ac7c90270e"},{"reference_url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-34jh-p97f-mpxf","reference_id":"","reference_type":"","scores":[{"value":"4.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements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redirects are not disabled when retries are disabled on PoolManager instantiation\nurllib3 handles redirects and retries using the same mechanism, which is controlled by the `Retry` object. The most common way to disable redirects is at the request level, as follows:\n\n```python\nresp = urllib3.request(\"GET\", \"https://httpbin.org/redirect/1\", redirect=False)\nprint(resp.status)\n# 302\n```\n\nHowever, it is also possible to disable redirects, for all requests, by instantiating a `PoolManager` and specifying `retries` in a way that disable redirects:\n\n```python\nimport urllib3\n\nhttp = urllib3.PoolManager(retries=0)  # should raise MaxRetryError on redirect\nhttp = urllib3.PoolManager(retries=urllib3.Retry(redirect=0))  # equivalent to the above\nhttp = urllib3.PoolManager(retries=False)  # should return the first response\n\nresp = http.request(\"GET\", \"https://httpbin.org/redirect/1\")\n```\n\nHowever, the `retries` parameter is currently ignored, which means all the above examples don't disable redirects.\n\n## Affected usages\n\nPassing `retries` on `PoolManager` instantiation to disable redirects or restrict their number.\n\nBy default, requests and botocore users are not affected.\n\n## Impact\n\nRedirects are often used to exploit SSRF vulnerabilities. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable.\n\n## Remediation\n\nYou can remediate this vulnerability with the following steps:\n\n * Upgrade to a patched version of urllib3. If your organization would benefit from the continued support of urllib3 1.x, please contact [sethmichaellarson@gmail.com](mailto:sethmichaellarson@gmail.com) to discuss sponsorship or contribution opportunities.\n * Disable redirects at the `request()` level instead of the `PoolManager()` level.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-50181.json","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-50181.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-50181","reference_id":"","reference_type":"","scores":[{"value":"0.00026","scoring_system":"epss","scoring_elements":"0.07158","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00026","scoring_system":"epss","scoring_elements":"0.07109","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.07942","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.07921","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.07934","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.07951","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.07885","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.07963","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23183","published_at":"2026-05-11T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23219","published_at":"2026-05-09T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23374","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.232","published_at":"2026-05-12T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23393","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23398","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23278","published_at":"2026-05-14T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23145","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.2306","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23162","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00079","scoring_system":"epss","scoring_elements":"0.23172","published_at":"2026-04-26T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-50181"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-50181","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-50181"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/urllib3/urllib3","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/urllib3/urllib3"},{"reference_url":"https://github.com/urllib3/urllib3/commit/f05b1329126d5be6de501f9d1e3e36738bc08857","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-23T16:45:50Z/"}],"url":"https://github.com/urllib3/urllib3/commit/f05b1329126d5be6de501f9d1e3e36738bc08857"},{"reference_url":"https://github.com/urllib3/urllib3/releases/tag/2.5.0","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-23T16:45:50Z/"}],"url":"https://github.com/urllib3/urllib3/releases/tag/2.5.0"},{"reference_url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-pq67-6m6q-mj2v","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-23T16:45:50Z/"}],"url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-pq67-6m6q-mj2v"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-50181","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-50181"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1108076","reference_id":"1108076","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1108076"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2373799","reference_id":"2373799","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2373799"},{"reference_url":"https://github.com/advisories/GHSA-pq67-6m6q-mj2v","reference_id":"GHSA-pq67-6m6q-mj2v","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-pq67-6m6q-mj2v"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:4215","reference_id":"RHSA-2026:4215","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:4215"},{"reference_url":"https://usn.ubuntu.com/7599-1/","reference_id":"USN-7599-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/7599-1/"},{"reference_url":"https://usn.ubuntu.com/7599-2/","reference_id":"USN-7599-2","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/7599-2/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/70769?format=json","purl":"pkg:pypi/urllib3@2.5.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-kjka-a931-uygj"},{"vulnerability":"VCID-v365-pn8r-e7dh"},{"vulnerability":"VCID-zevs-1ge5-y7g7"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/urllib3@2.5.0"}],"aliases":["CVE-2025-50181","GHSA-pq67-6m6q-mj2v"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-7wcj-zvjq-xud3"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/30149?format=json","vulnerability_id":"VCID-dxkv-8f9g-47e9","summary":"urllib3 does not control redirects in browsers and Node.js\nurllib3 [supports](https://urllib3.readthedocs.io/en/2.4.0/reference/contrib/emscripten.html) being used in a Pyodide runtime utilizing the [JavaScript Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) or falling back on [XMLHttpRequest](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest). This means you can use Python libraries to make HTTP requests from your browser or Node.js. Additionally, urllib3 provides [a mechanism](https://urllib3.readthedocs.io/en/2.4.0/user-guide.html#retrying-requests) to control redirects.\n\nHowever, the `retries` and `redirect` parameters are ignored with Pyodide; the runtime itself determines redirect behavior.\n\n\n## Affected usages\n\nAny code which relies on urllib3 to control the number of redirects for an HTTP request in a Pyodide runtime.\n\n\n## Impact\n\nRedirects are often used to exploit SSRF vulnerabilities. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects may remain vulnerable if a Pyodide runtime redirect mechanism is unsuitable.\n\n\n## Remediation\n\nIf you use urllib3 in Node.js, upgrade to a patched version of urllib3.\n\nUnfortunately, browsers provide no suitable way which urllib3 can use: `XMLHttpRequest` provides no control over redirects, the Fetch API returns `opaqueredirect` responses lacking data when redirects are controlled manually. Expect default browser behavior for redirects.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-50182.json","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-50182.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-50182","reference_id":"","reference_type":"","scores":[{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05791","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05753","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00023","scoring_system":"epss","scoring_elements":"0.06272","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00023","scoring_system":"epss","scoring_elements":"0.0629","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00023","scoring_system":"epss","scoring_elements":"0.06302","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00023","scoring_system":"epss","scoring_elements":"0.06306","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00023","scoring_system":"epss","scoring_elements":"0.06227","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00023","scoring_system":"epss","scoring_elements":"0.06313","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20231","published_at":"2026-05-11T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20267","published_at":"2026-05-09T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20357","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20251","published_at":"2026-05-12T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.2036","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20358","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20337","published_at":"2026-05-14T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20181","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20105","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20193","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00066","scoring_system":"epss","scoring_elements":"0.20226","published_at":"2026-04-26T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-50182"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/urllib3/urllib3","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/urllib3/urllib3"},{"reference_url":"https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a279c29b6d1f0ed0f42e9736194f","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-23T16:55:48Z/"}],"url":"https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a279c29b6d1f0ed0f42e9736194f"},{"reference_url":"https://github.com/urllib3/urllib3/releases/tag/2.5.0","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-23T16:55:48Z/"}],"url":"https://github.com/urllib3/urllib3/releases/tag/2.5.0"},{"reference_url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-48p4-8xcf-vxj5","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-23T16:55:48Z/"}],"url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-48p4-8xcf-vxj5"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-50182","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-50182"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1108077","reference_id":"1108077","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1108077"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2373800","reference_id":"2373800","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2373800"},{"reference_url":"https://github.com/advisories/GHSA-48p4-8xcf-vxj5","reference_id":"GHSA-48p4-8xcf-vxj5","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-48p4-8xcf-vxj5"},{"reference_url":"https://usn.ubuntu.com/7599-1/","reference_id":"USN-7599-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/7599-1/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/70769?format=json","purl":"pkg:pypi/urllib3@2.5.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-kjka-a931-uygj"},{"vulnerability":"VCID-v365-pn8r-e7dh"},{"vulnerability":"VCID-zevs-1ge5-y7g7"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/urllib3@2.5.0"}],"aliases":["CVE-2025-50182","GHSA-48p4-8xcf-vxj5"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-dxkv-8f9g-47e9"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/20200?format=json","vulnerability_id":"VCID-kjka-a931-uygj","summary":"Decompression-bomb safeguards bypassed when following HTTP redirects (streaming API)\n### Impact\n\nurllib3's [streaming API](https://urllib3.readthedocs.io/en/2.6.2/advanced-usage.html#streaming-and-i-o) is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once.\n\nurllib3 can perform decoding or decompression based on the HTTP `Content-Encoding` header (e.g., `gzip`, `deflate`, `br`, or `zstd`). When using the streaming API, the library decompresses only the necessary bytes, enabling partial content consumption.\n\nHowever, for HTTP redirect responses, the library would read the entire response body to drain the connection and decompress the content unnecessarily. This decompression occurred even before any read methods were called, and configured read limits did not restrict the amount of decompressed data. As a result, there was no safeguard against decompression bombs. A malicious server could exploit this to trigger excessive resource consumption on the client (high CPU usage and large memory allocations for decompressed data; CWE-409).\n\n### Affected usages\n\nApplications and libraries using urllib3 version 2.6.2 and earlier to stream content from untrusted sources by setting `preload_content=False` when they do not disable redirects.\n\n\n### Remediation\n\nUpgrade to at least urllib3 v2.6.3 in which the library does not decode content of redirect responses when `preload_content=False`.\n\nIf upgrading is not immediately possible, disable [redirects](https://urllib3.readthedocs.io/en/2.6.2/user-guide.html#retrying-requests) by setting `redirect=False` for requests to untrusted 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streaming API improperly handles highly compressed data\nurllib3's [streaming API](https://urllib3.readthedocs.io/en/2.5.0/advanced-usage.html#streaming-and-i-o) is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once.\n\nWhen streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP `Content-Encoding` header (e.g., `gzip`, `deflate`, `br`, or `zstd`). The library must read compressed data from the network and decompress it until the requested chunk size is met. Any resulting decompressed data that exceeds the requested amount is held in an internal buffer for the next read operation.\n\nThe decompression logic could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. 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