# CVE-2024-6866: python3-flask-cors: corydolphin/flask-cors version 4.01 contains a vulnerability where therequest path matching is case-insensitive due t...

CVE-2024-6866 is fixed in 2 products on 1 platform, first by python3-flask-cors 3.0.8-2ubuntu0.1+esm1, released March 20, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-6866
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0072
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 20, 2025

## Description

corydolphin/flask-cors version 4.01 contains a vulnerability where therequest path matching is case-insensitive due to the use of the `try_match`function, which is originally intended for matching hosts. This results ina mismatch because paths in URLs are case-sensitive, but the regex matchingtreats them as case-insensitive. This misconfiguration can lead tosignificant security vulnerabilities, allowing unauthorized origins toaccess paths meant to be restricted, resulting in data exposure andpotential data leaks.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-flask-cors Debian 12.15 (bookworm) | 3.0.10-2+deb12u1 | [DEBIAN-CVE-2024-6866](https://patchblox.com/security/data/fix/linux/debian-cve-2024-6866.md) | Mar 20, 2025 |
| Linux | python-flask-cors Debian 13.5 (trixie) | 6.0.0-1 | [DEBIAN-CVE-2024-6866](https://patchblox.com/security/data/fix/linux/debian-cve-2024-6866.md) | Mar 20, 2025 |
| Linux | python-flask-cors Debian 14 | 6.0.0-1 | [DEBIAN-CVE-2024-6866](https://patchblox.com/security/data/fix/linux/debian-cve-2024-6866.md) | Mar 20, 2025 |
| Linux | python3-flask-cors Ubuntu 20.04 LTS (focal) | 3.0.8-2ubuntu0.1+esm1 | [python3-flask-cors 3.0.8-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-flask-cors-3.0.8-2ubuntu0.1-esm1.md) | Mar 20, 2025 |
| Linux | python3-flask-cors Ubuntu 22.04.1 LTS (jammy) | 3.0.9-2ubuntu0.1 | [python3-flask-cors 3.0.9-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-flask-cors-3.0.9-2ubuntu0.1.md) | Mar 20, 2025 |
| Linux | python3-flask-cors Ubuntu 24.04.5 LTS (noble) | 4.0.0-1ubuntu0.1~esm1 | [python3-flask-cors 4.0.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-flask-cors-4.0.0-1ubuntu0.1-esm1.md) | Mar 20, 2025 |
| Linux | python3-flask-cors Ubuntu 24.10 (oracular) | 4.0.1-1ubuntu0.1 | [python3-flask-cors 4.0.1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-flask-cors-4.0.1-1ubuntu0.1.md) | Jan 16, 2026 |
| Linux | python3-flask-cors Ubuntu 25.04 (plucky) | 5.0.0-1ubuntu0.1 | [python3-flask-cors 5.0.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-flask-cors-5.0.0-1ubuntu0.1.md) | Jan 16, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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