{
  "cveId": "CVE-2026-33672",
  "url": "https://patchblox.com/security/cve/CVE-2026-33672",
  "summary": "CVE-2026-33672 is fixed in node-anymatch on 1 platform by DEBIAN-CVE-2026-33672 (version 3.1.3\u002B~cs8.0.6-1), released March 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Picomatch: Method Injection in POSIX Character Classes causes incorrect Glob Matching",
  "description": "Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to a method injection vulnerability affecting the \u0060POSIX_REGEX_SOURCE\u0060 object. Because the object inherits from \u0060Object.prototype\u0060, specially crafted POSIX bracket expressions (e.g., \u0060[[:constructor:]]\u0060) can reference inherited method names. These methods are implicitly converted to strings and injected into the generated regular expression. This leads to incorrect glob matching behavior (integrity impact), where patterns may match unintended filenames. The issue does not enable remote code execution, but it can cause security-relevant logic errors in applications that rely on glob matching for filtering, validation, or access control. All users of affected \u0060picomatch\u0060 versions that process untrusted or user-controlled glob patterns are potentially impacted. This issue is fixed in picomatch 4.0.4, 3.0.2 and 2.3.2. Users should upgrade to one of these versions or later, depending on their supported release line. If upgrading is not immediately possible, avoid passing untrusted glob patterns to picomatch. Possible mitigations include sanitizing or rejecting untrusted glob patterns, especially those containing POSIX character classes like \u0060[[:...:]]\u0060; avoiding the use of POSIX bracket expressions if user input is involved; and manually patching the library by modifying \u0060POSIX_REGEX_SOURCE\u0060 to use a null prototype.",
  "published": "2026-03-26T22:16:30Z",
  "severity": "Moderate",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "cwe": "Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
  "epss": 0.00425,
  "epssPercentile": 0.37054,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33672",
  "fixes": [
    {
      "platform": "linux",
      "product": "node-anymatch",
      "release": "Debian 14",
      "fixedVersion": "3.1.3\u002B~cs8.0.6-1",
      "fix": "DEBIAN-CVE-2026-33672",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33672",
      "released": "2026-03-26T22:16:30Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}