{"id":"GHSA-8vgw-p6qm-5gr7","summary":"Flask-CORS allows for inconsistent CORS matching","details":"A vulnerability in corydolphin/flask-cors version 5.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquote_plus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path normalization, causing potential mismatches in CORS configuration. As a result, endpoints may not be matched correctly to their CORS settings, leading to unexpected CORS policy application. This can cause unauthorized cross-origin access or block valid requests, creating security vulnerabilities and usability issues.","aliases":["CVE-2024-6844","PYSEC-2026-1385"],"modified":"2026-09-10T03:50:23.027959228Z","published":"2025-03-20T12:32:45Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2025-03-21T22:10:24Z","nvd_published_at":"2025-03-20T10:15:34Z","cwe_ids":["CWE-346"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-6844"},{"type":"WEB","url":"https://github.com/corydolphin/flask-cors/commit/35d875319621bd129a38b2b823abf4a2f6cda536"},{"type":"PACKAGE","url":"https://github.com/corydolphin/flask-cors"},{"type":"WEB","url":"https://github.com/corydolphin/flask-cors/blob/main/flask_cors/extension.py#L193"},{"type":"WEB","url":"https://huntr.com/bounties/731a6cd4-d05f-4fe6-8f5b-fe088d7b34e0"},{"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":{"last_known_affected_version_range":"\u003c= 5.0.1","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-8vgw-p6qm-5gr7/GHSA-8vgw-p6qm-5gr7.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}