{"id":"GHSA-43qf-4rqw-9q2g","summary":"Flask-CORS vulnerable to Improper Handling of Case Sensitivity","details":"corydolphin/flask-cors version 5.0.1 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.","aliases":["CVE-2024-6866","PYSEC-2026-1383"],"modified":"2026-09-10T03:50:56.795708366Z","published":"2025-03-20T12:32:45Z","database_specific":{"nvd_published_at":"2025-03-20T10:15:34Z","cwe_ids":["CWE-178"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2025-03-21T22:16:04Z"},"references":[{"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"},{"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"}],"affected":[{"package":{"name":"flask-cors","ecosystem":"PyPI","purl":"pkg:pypi/flask-cors"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0"}]}],"versions":["0.0.0.dev3","0.0.0.dev4","1.0","1.1","1.1.1","1.1.2","1.1.3","1.10.0","1.10.1","1.10.2","1.10.3","1.2.0","1.2.1","1.3.0","1.3.1","1.4.0","1.5.0","1.6.0","1.6.1","1.7.0","1.7.1","1.7.2","1.7.3","1.7.4","1.8.0","1.8.1","1.9.0","2.0.0","2.0.0rc1","2.0.1","2.1.0","2.1.1","2.1.2","2.1.3","3.0.0","3.0.1","3.0.10","3.0.2","3.0.3","3.0.4","3.0.6","3.0.7","3.0.8","3.0.9","4.0.0","4.0.0a0","4.0.1","4.0.2","5.0.0","5.0.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-43qf-4rqw-9q2g/GHSA-43qf-4rqw-9q2g.json","last_known_affected_version_range":"\u003c= 5.0.1"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N"}]}