Flask-CORS improper regex path matching vulnerability
corydolphin/flask-cors version 5.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to less restrictive CORS policies being applied to sensitive endpoints. This mismatch in regex pattern priority allows unauthorized cross-origin access to sensitive data or functionality, potentially exposing confidential information and increasing the risk of unauthorized actions by malicious actors.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-6839US | medium5.3 | — | ||
corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching path… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/corydolphin/flask-corsPACKAGE
- https://github.com/corydolphin/flask-cors/blob/4.0.1/flask_cors/core.py#L73WEB
- https://github.com/corydolphin/flask-cors/commit/e970988bea563e05e8b8f53fa7bcc134b5bf5c5fWEB
- https://huntr.com/bounties/403eb1fc-86f4-4820-8eba-0f3dfae9f2b4WEB
- https://lists.debian.org/debian-lts-announce/2025/05/msg00049.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2024-6839ADVISORY
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