BREW-MIKUTTER-CVE-2022-24836 (GHSA-CRJR-9RC5-GHW8)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:14 – Updated: 2026-08-13 17:14 – Source website
VLAI
Summary
Nokogiri Inefficient Regular Expression Complexity
Details

Summary

Nokogiri < v1.13.4 contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to detect encoding in HTML documents.

Mitigation

Upgrade to Nokogiri >= 1.13.4.

Severity

The Nokogiri maintainers have evaluated this as High Severity 7.5 (CVSS3.1).

References

CWE-1333 Inefficient Regular Expression Complexity

Credit

This vulnerability was reported by HackerOne user ooooooo_q (ななおく).

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "nokogiri",
        "resource_purl": "pkg:gem/nokogiri@1.16.3",
        "upstream_fixed_in": "1.13.4"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "mikutter",
        "purl": "pkg:brew/mikutter"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "RubyGems",
        "key": "pkg:gem/nokogiri@1.16.3",
        "name": "nokogiri",
        "resource": "nokogiri",
        "strategy": "registry",
        "subject_version": "1.16.3"
      }
    ]
  },
  "details": "## Summary\n\nNokogiri `\u003c v1.13.4` contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to detect encoding in HTML documents.\n\n## Mitigation\n\nUpgrade to Nokogiri `\u003e= 1.13.4`.\n\n\n## Severity\n\nThe Nokogiri maintainers have evaluated this as [**High Severity** 7.5 (CVSS3.1)](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).\n\n\n## References\n\n[CWE-1333](https://cwe.mitre.org/data/definitions/1333.html) Inefficient Regular Expression Complexity\n\n\n## Credit\n\nThis vulnerability was reported by HackerOne user ooooooo_q (\u306a\u306a\u304a\u304f).\n",
  "id": "BREW-mikutter-CVE-2022-24836",
  "modified": "2026-08-13T17:14:10Z",
  "published": "2026-08-13T17:14:10Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-crjr-9rc5-ghw8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-24836"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/nokogiri/commit/e444525ef1634b675cd1cf52d39f4320ef0aecfd"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2022-24836.yml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sparklemotion/nokogiri"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/nokogiri/releases/tag/v1.13.4"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/ruby-security-ann/c/vX7qSjsvWis/m/TJWN4oOKBwAJ?utm_medium=email\u0026utm_source=footer"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00013.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6DHCOWMA5PQTIQIMDENA7R2Y5BDYAIYM"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OUPLBUZVM4WPFSXBEP2JS3R6LMKRTLFC"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XMDCWRQXJQ3TFSETPCEFMQ6RR6ME5UA3"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202208-29"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT213532"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2022/Dec/23"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nokogiri Inefficient Regular Expression Complexity",
  "upstream": [
    "GHSA-crjr-9rc5-ghw8",
    "CVE-2022-24836"
  ]
}



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