BREW-MOTO-CVE-2024-6839 (GHSA-7RXF-GVFG-47G4)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:14 – Updated: 2026-09-22 01:48 – Source website
VLAI
Summary
Flask-CORS improper regex path matching vulnerability
Details

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.

Severity
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "flask-cors",
        "resource_purl": "pkg:pypi/flask-cors@6.0.5",
        "upstream_fixed_in": "6.0.0"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "moto",
        "purl": "pkg:brew/moto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.2"
            },
            {
              "fixed": "5.1.4_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/flask-cors@6.0.5",
        "name": "flask-cors",
        "resource": "flask-cors",
        "strategy": "registry",
        "subject_version": "6.0.5"
      }
    ]
  },
  "details": "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.",
  "id": "BREW-moto-CVE-2024-6839",
  "modified": "2026-09-22T01:48:27Z",
  "published": "2026-08-13T17:14:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-6839"
    },
    {
      "type": "WEB",
      "url": "https://github.com/corydolphin/flask-cors/commit/e970988bea563e05e8b8f53fa7bcc134b5bf5c5f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/corydolphin/flask-cors"
    },
    {
      "type": "WEB",
      "url": "https://github.com/corydolphin/flask-cors/blob/4.0.1/flask_cors/core.py#L73"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/403eb1fc-86f4-4820-8eba-0f3dfae9f2b4"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Flask-CORS improper regex path matching vulnerability",
  "upstream": [
    "GHSA-7rxf-gvfg-47g4",
    "CVE-2024-6839",
    "PYSEC-2026-1384"
  ]
}



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