{"id":"CVE-2024-6866","aliases":["GHSA-43qf-4rqw-9q2g","PYSEC-2026-1383"],"url":"https://o3.security/vulnerability/CVE-2024-6866","summary":"Case-Insensitive Path Matching in corydolphin/flask-cors","details":"corydolphin/flask-cors version 4.01 contains a vulnerability where the request path matching is case-insensitive due to the use of the `try_match` function, which is originally intended for matching hosts. This results in a mismatch because paths in URLs are case-sensitive, but the regex matching treats them as case-insensitive. This misconfiguration can lead to significant security vulnerabilities, allowing unauthorized origins to access paths meant to be restricted, resulting in data exposure and potential data leaks.","published":"2025-03-20T10:10:59.521Z","modified":"2026-08-12T03:51:10.942706322Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N"},"epss":{"score":0.00694,"percentile":0.51318,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"flask-cors","fixedVersion":"6.0.0"}],"fix":{"url":"https://github.com/corydolphin/flask-cors/commit/eb39516a3c96b90d0ae5f51293972395ec3ef358","label":"corydolphin/flask-cors@eb39516"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/808c11af-faee-43a8-824b-b5ab4f62b9e6"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/6xxx/CVE-2024-6866.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-6866"},{"type":"WEB","url":"https://github.com/corydolphin/flask-cors/commit/eb39516a3c96b90d0ae5f51293972395ec3ef358"},{"type":"PACKAGE","url":"https://github.com/corydolphin/flask-cors"},{"type":"WEB","url":"https://github.com/corydolphin/flask-cors/blob/4.0.1/flask_cors/extension.py#L195"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:10.942706322Z"}}