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DEBIAN-CVE-2026-33671

Type: advisorySource: OSV1 source record

Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) when processing crafted extglob patterns. Certain patterns using extglob quantifiers such as `+()` and `*()`, especially when combined with overlapping alternatives or nested extglobs, are compiled into regular expressions that can exhibit catastrophic backtracking on non-matching input. Applications are impacted when they allow untrusted users to supply glob patterns that are passed to `picomatch` for compilation or matching. In those cases, an attacker can cause excessive CPU consumption and block the Node.js event loop, resulting in a denial of service. Applications that only use trusted, developer-controlled glob patterns are much less likely to be exposed in a security-relevant way. 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 disabling extglob support for untrusted patterns by using `noextglob: true`, rejecting or sanitizing patterns containing nested extglobs or extglob quantifiers such as `+()` and `*()`, enforcing strict allowlists for accepted pattern syntax, running matching in an isolated worker or separate process with time and resource limits, and applying application-level reques

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-33671

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-33671

node-anymatch

Source reference: /affected/0/package/name

Affected versions
3.1.3+~cs4.6.1-2

Source reference: /affected/0/versions

3.1.3+~cs8.0.5-1

Source reference: /affected/0/versions

3.1.3+~cs8.0.6-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

node-anymatch

Source reference: /affected/1/package/name

Affected versions
3.1.3+~cs4.6.1-2

Source reference: /affected/1/versions

3.1.3+~cs8.0.5-1

Source reference: /affected/1/versions

3.1.3+~cs8.0.6-1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

node-anymatch

Source reference: /affected/2/package/name

Affected versions
3.1.3+~cs4.6.1-2

Source reference: /affected/2/versions

3.1.3+~cs8.0.5-1

Source reference: /affected/2/versions

Fixed versions
3.1.3+~cs8.0.6-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-anymatch",
      "purl": "pkg:deb/debian/node-anymatch?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.1.3+~cs4.6.1-2",
      "3.1.3+~cs8.0.5-1",
      "3.1.3+~cs8.0.6-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33671.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-anymatch",
      "purl": "pkg:deb/debian/node-anymatch?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.1.3+~cs4.6.1-2",
      "3.1.3+~cs8.0.5-1",
      "3.1.3+~cs8.0.6-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33671.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.1.3+~cs8.0.6-1"
          }
        ]
      }
    ],
    "package": {
      "name": "node-anymatch",
      "purl": "pkg:deb/debian/node-anymatch?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.1.3+~cs4.6.1-2",
      "3.1.3+~cs8.0.5-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33671.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56794 · Revision 1
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Publisher date
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