{"url":"http://public2.vulnerablecode.io/api/packages/66619?format=json","purl":"pkg:pypi/werkzeug@3.1.4","type":"pypi","namespace":"","name":"werkzeug","version":"3.1.4","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"3.1.6","latest_non_vulnerable_version":"3.1.6","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/20594?format=json","vulnerability_id":"VCID-3mxv-vxtj-8kde","summary":"Werkzeug safe_join() allows Windows special device names with compound extensions\nWerkzeug's `safe_join` function allows path segments with Windows device names that have file extensions or trailing spaces. On Windows, there are special device names such as `CON`, `AUX`, etc that are implicitly present and readable in every directory. Windows still accepts them with any file extension, such as `CON.txt`, or trailing spaces such as `CON `.\n\nThis was previously reported as https://github.com/pallets/werkzeug/security/advisories/GHSA-hgf8-39gv-g3f2, but the fix failed to account for compound extensions such as `CON.txt.html` or trailing spaces. It also missed some additional special names.\n\n`send_from_directory` uses `safe_join` to safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-21860","reference_id":"","reference_type":"","scores":[{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05944","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06254","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06154","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06133","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06126","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06096","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06073","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05921","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.0591","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05946","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05965","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05983","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05914","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05905","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05955","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.05881","published_at":"2026-04-02T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-21860"},{"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:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/pallets/werkzeug","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pallets/werkzeug"},{"reference_url":"https://github.com/pallets/werkzeug/commit/7ae1d254e04a0c33e241ac1cca4783ce6c875ca3","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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/2026-01-08T18:50:24Z/"}],"url":"https://github.com/pallets/werkzeug/commit/7ae1d254e04a0c33e241ac1cca4783ce6c875ca3"},{"reference_url":"https://github.com/pallets/werkzeug/security/advisories/GHSA-87hc-h4r5-73f7","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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/2026-01-08T18:50:24Z/"}],"url":"https://github.com/pallets/werkzeug/security/advisories/GHSA-87hc-h4r5-73f7"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21860","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21860"},{"reference_url":"https://github.com/advisories/GHSA-87hc-h4r5-73f7","reference_id":"GHSA-87hc-h4r5-73f7","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-87hc-h4r5-73f7"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/62222?format=json","purl":"pkg:pypi/werkzeug@3.1.5","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-jxz2-8tqb-mbeg"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/werkzeug@3.1.5"}],"aliases":["CVE-2026-21860","GHSA-87hc-h4r5-73f7"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-3mxv-vxtj-8kde"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/20979?format=json","vulnerability_id":"VCID-jxz2-8tqb-mbeg","summary":"Werkzeug safe_join() allows Windows special device names\nWerkzeug's `safe_join` function allows Windows device names as filenames if when preceded by other path segments.\n\nThis was previously reported as https://github.com/pallets/werkzeug/security/advisories/GHSA-hgf8-39gv-g3f2, but the added filtering failed to account for the fact that `safe_join` accepts paths with multiple segments, such as `example/NUL`.\n\n`send_from_directory` uses `safe_join` to safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-27199","reference_id":"","reference_type":"","scores":[{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.0533","published_at":"2026-04-04T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05298","published_at":"2026-04-02T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05377","published_at":"2026-04-11T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05409","published_at":"2026-04-09T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05386","published_at":"2026-04-08T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05352","published_at":"2026-04-07T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05542","published_at":"2026-04-29T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05541","published_at":"2026-04-26T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.055","published_at":"2026-04-24T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05461","published_at":"2026-04-21T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05304","published_at":"2026-04-18T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05357","published_at":"2026-04-13T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05366","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00021","scoring_system":"epss","scoring_elements":"0.059","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00021","scoring_system":"epss","scoring_elements":"0.0582","published_at":"2026-05-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-27199"},{"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:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/pallets/werkzeug","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pallets/werkzeug"},{"reference_url":"https://github.com/pallets/werkzeug/commit/f407712fdc60a09c2b3f4fe7db557703e5d9338d","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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/2026-02-24T19:02:05Z/"}],"url":"https://github.com/pallets/werkzeug/commit/f407712fdc60a09c2b3f4fe7db557703e5d9338d"},{"reference_url":"https://github.com/pallets/werkzeug/releases/tag/3.1.6","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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/2026-02-24T19:02:05Z/"}],"url":"https://github.com/pallets/werkzeug/releases/tag/3.1.6"},{"reference_url":"https://github.com/pallets/werkzeug/security/advisories/GHSA-29vq-49wr-vm6x","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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/2026-02-24T19:02:05Z/"}],"url":"https://github.com/pallets/werkzeug/security/advisories/GHSA-29vq-49wr-vm6x"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27199","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27199"},{"reference_url":"https://github.com/advisories/GHSA-29vq-49wr-vm6x","reference_id":"GHSA-29vq-49wr-vm6x","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-29vq-49wr-vm6x"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/62946?format=json","purl":"pkg:pypi/werkzeug@3.1.6","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/werkzeug@3.1.6"}],"aliases":["CVE-2026-27199","GHSA-29vq-49wr-vm6x"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-jxz2-8tqb-mbeg"}],"fixing_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/23688?format=json","vulnerability_id":"VCID-6cpm-rdw8-7fh6","summary":"Werkzeug safe_join() allows Windows special device names\nWerkzeug's `safe_join` function allows path segments with Windows device names. On Windows, there are special device names such as `CON`, `AUX`, etc that are implicitly present and readable in every directory. `send_from_directory` uses `safe_join` to safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-66221.json","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-66221.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-66221","reference_id":"","reference_type":"","scores":[{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.08125","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.07993","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00028","scoring_system":"epss","scoring_elements":"0.08024","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09101","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.0912","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09149","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09232","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09297","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09256","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09226","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.0923","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09225","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.0918","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09239","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.0927","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00032","scoring_system":"epss","scoring_elements":"0.09268","published_at":"2026-04-09T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-66221"},{"reference_url":"https://github.com/pallets/werkzeug","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pallets/werkzeug"},{"reference_url":"https://github.com/pallets/werkzeug/commit/4b833376a45c323a189cd11d2362bcffdb1c0c13","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-01T15:35:05Z/"}],"url":"https://github.com/pallets/werkzeug/commit/4b833376a45c323a189cd11d2362bcffdb1c0c13"},{"reference_url":"https://github.com/pallets/werkzeug/releases/tag/3.1.4","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-01T15:35:05Z/"}],"url":"https://github.com/pallets/werkzeug/releases/tag/3.1.4"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2417789","reference_id":"2417789","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2417789"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66221","reference_id":"CVE-2025-66221","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66221"},{"reference_url":"https://github.com/advisories/GHSA-hgf8-39gv-g3f2","reference_id":"GHSA-hgf8-39gv-g3f2","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-hgf8-39gv-g3f2"},{"reference_url":"https://github.com/pallets/werkzeug/security/advisories/GHSA-hgf8-39gv-g3f2","reference_id":"GHSA-hgf8-39gv-g3f2","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-01T15:35:05Z/"}],"url":"https://github.com/pallets/werkzeug/security/advisories/GHSA-hgf8-39gv-g3f2"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/66619?format=json","purl":"pkg:pypi/werkzeug@3.1.4","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-3mxv-vxtj-8kde"},{"vulnerability":"VCID-jxz2-8tqb-mbeg"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/werkzeug@3.1.4"}],"aliases":["CVE-2025-66221","GHSA-hgf8-39gv-g3f2"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-6cpm-rdw8-7fh6"}],"risk_score":"3.1","resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/werkzeug@3.1.4"}