BREW-FONTTOOLS-CVE-2026-111497 (GHSA-9V8H-QQGM-4M35)

Vulnerability from osv_homebrew – Published: 2026-10-26 09:30 – Updated: 2026-10-26 09:30 – Source website
VLAI
Summary
Brotli: Out-of-bounds write in the Brotli decoder ("Node2Shell") also affects the PyPI Brotli package
Details

A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.

Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.

Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "brotli",
        "resource_purl": "pkg:pypi/brotli@1.2.1",
        "upstream_fixed_in": "1.2.1"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "fonttools",
        "purl": "pkg:brew/fonttools"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.34.4_1"
            },
            {
              "fixed": "4.45.0"
            },
            {
              "introduced": "4.49.0"
            },
            {
              "fixed": "4.67.0_1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/brotli@1.2.1",
        "name": "brotli",
        "resource": "brotli",
        "strategy": "registry",
        "subject_version": "1.2.1"
      }
    ]
  },
  "details": "A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.\n\nUsers need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.",
  "id": "BREW-fonttools-CVE-2026-111497",
  "modified": "2026-10-26T09:30:41Z",
  "published": "2026-10-26T09:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111497"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/brotli/commit/0ed4268a4401abcb4472096340477cf4af7d1a2b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/brotli/commit/50a9b70a4d5e1443fc40927952276b68fffa83a0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/brotli/commit/b418fa81c48262a86a95332b0bc6d62c30aa78b6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/brotli/commit/da9806362874b9bd4b552a3af360b5d6347beb12"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-111497"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/brotlicffi"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/Brotli"
    },
    {
      "type": "WEB",
      "url": "https://opensourcemalware.com/blog/node2shell-affects-python"
    },
    {
      "type": "WEB",
      "url": "https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high"
    },
    {
      "type": "WEB",
      "url": "https://nodejs.org/en/blog/vulnerability/october-2026-security-releases"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/brotlicffi/PYSEC-2026-4323.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/brotli/PYSEC-2026-4322.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/brotli/releases/tag/v1.2.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/brotli/releases/tag/v1.1.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/brotli/releases/tag/v1.0.10"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/google/brotli"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Brotli: Out-of-bounds write in the Brotli decoder (\"Node2Shell\") also affects the PyPI Brotli package",
  "upstream": [
    "GHSA-9v8h-qqgm-4m35",
    "BIT-node-2026-111497",
    "BIT-node-min-2026-111497",
    "CVE-2026-111497",
    "PYSEC-2026-4322",
    "PYSEC-2026-4323"
  ]
}



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