{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/48153?format=json","vulnerability_id":"VCID-6wzh-4g3t-93gv","summary":"Starlette vulnerable to O(n^2) DoS via Range header merging in ``starlette.responses.FileResponse``\nAn unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette's `FileResponse` Range parsing/merging logic. This enables CPU exhaustion per request, causing denial‑of‑service for endpoints serving files (e.g., `StaticFiles` or any use of `FileResponse`).","aliases":[{"alias":"CVE-2025-62727"},{"alias":"GHSA-7f5h-v6xp-fcq8"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/129744?format=json","purl":"pkg:deb/debian/starlette@0?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/starlette@0%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/129734?format=json","purl":"pkg:deb/debian/starlette@0.14.1-1?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-2c5q-buqw-u7ex"},{"vulnerability":"VCID-71x5-qbjg-ukfq"},{"vulnerability":"VCID-8crr-rfdt-p7bq"},{"vulnerability":"VCID-vgxy-kjyx-bqfm"},{"vulnerability":"VCID-z97b-rhv4-17c5"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/starlette@0.14.1-1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/129735?format=json","purl":"pkg:deb/debian/starlette@0.26.1-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/starlette@0.26.1-1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/129739?format=json","purl":"pkg:deb/debian/starlette@0.46.1-3%2Bdeb13u1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/starlette@0.46.1-3%252Bdeb13u1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/129745?format=json","purl":"pkg:deb/debian/starlette@0.50.0-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/starlette@0.50.0-1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/129737?format=json","purl":"pkg:deb/debian/starlette@1.1.0-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/starlette@1.1.0-1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/50826?format=json","purl":"pkg:pypi/starlette@0.49.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-2c5q-buqw-u7ex"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starlette@0.49.1"}],"affected_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/50802?format=json","purl":"pkg:pypi/starlette@0.39.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-2c5q-buqw-u7ex"},{"vulnerability":"VCID-6wzh-4g3t-93gv"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starlette@0.39.0"}],"references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-62727.json","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-62727.json"},{"reference_url":"https://github.com/Kludex/starlette","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/Kludex/starlette"},{"reference_url":"https://github.com/Kludex/starlette/commit/4ea6e22b489ec388d6004cfbca52dd5b147127c5","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/Kludex/starlette/commit/4ea6e22b489ec388d6004cfbca52dd5b147127c5"},{"reference_url":"https://github.com/Kludex/starlette/commit/69ed26a85956ef4bd0161807eb27abf49be7cd3c","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/Kludex/starlette/commit/69ed26a85956ef4bd0161807eb27abf49be7cd3c"},{"reference_url":"https://github.com/Kludex/starlette/releases/tag/0.49.1","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/Kludex/starlette/releases/tag/0.49.1"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1119662","reference_id":"1119662","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1119662"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2406929","reference_id":"2406929","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2406929"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62727","reference_id":"CVE-2025-62727","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62727"},{"reference_url":"https://github.com/advisories/GHSA-7f5h-v6xp-fcq8","reference_id":"GHSA-7f5h-v6xp-fcq8","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-7f5h-v6xp-fcq8"},{"reference_url":"https://github.com/Kludex/starlette/security/advisories/GHSA-7f5h-v6xp-fcq8","reference_id":"GHSA-7f5h-v6xp-fcq8","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/Kludex/starlette/security/advisories/GHSA-7f5h-v6xp-fcq8"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:22759","reference_id":"RHSA-2025:22759","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:22759"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:23078","reference_id":"RHSA-2025:23078","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:23078"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:23079","reference_id":"RHSA-2025:23079","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:23079"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:23080","reference_id":"RHSA-2025:23080","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:23080"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:23131","reference_id":"RHSA-2025:23131","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:23131"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:23133","reference_id":"RHSA-2025:23133","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:23133"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:23531","reference_id":"RHSA-2025:23531","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:23531"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:22993","reference_id":"RHSA-2026:22993","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:22993"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:3461","reference_id":"RHSA-2026:3461","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:3461"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:3462","reference_id":"RHSA-2026:3462","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:3462"}],"weaknesses":[{"cwe_id":400,"name":"Uncontrolled Resource Consumption","description":"The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources."},{"cwe_id":407,"name":"Inefficient Algorithmic Complexity","description":"An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached."},{"cwe_id":937,"name":"OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013."},{"cwe_id":1035,"name":"OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017."}],"exploits":[],"severity_range_score":"7.0 - 8.9","exploitability":"0.5","weighted_severity":"8.0","risk_score":4.0,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-6wzh-4g3t-93gv"}