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GHSA-V973-FXGF-6XHP

Vulnerability from github – Published: 2022-09-16 17:20 – Updated: 2025-12-03 15:11
VLAI
Summary
mako is vulnerable to Regular Expression Denial of Service
Details

Sqlalchemy mako before 1.2.2 is vulnerable to Regular expression Denial of Service when using the Lexer class to parse. This also affects babelplugin and linguaplugin.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "mako"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-40023"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-09-16T17:20:25Z",
    "nvd_published_at": "2022-09-07T13:15:00Z",
    "severity": "HIGH"
  },
  "details": "Sqlalchemy mako before 1.2.2 is vulnerable to Regular expression Denial of Service when using the Lexer class to parse. This also affects babelplugin and linguaplugin.",
  "id": "GHSA-v973-fxgf-6xhp",
  "modified": "2025-12-03T15:11:43Z",
  "published": "2022-09-16T17:20:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-40023"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sqlalchemy/mako/issues/366"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-v973-fxgf-6xhp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/mako/PYSEC-2022-260.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sqlalchemy/mako"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sqlalchemy/mako/blob/c2f392e0be52dc67d1b9770ab8cce6a9c736d547/mako/ext/extract.py#L21"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/09/msg00026.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/12/msg00004.html"
    },
    {
      "type": "WEB",
      "url": "https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages"
    },
    {
      "type": "WEB",
      "url": "https://pyup.io/vulnerabilities/CVE-2022-40023/50870"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "mako is vulnerable to Regular Expression Denial of Service"
}



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