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CVE-2026-33672

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 `POSIX_REGEX_SOURCE` object. Because the object inherits from `Object.prototype`, specially crafted POSIX bracket expressions (e.g., `[[:constructor:]]`) 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 (int
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1b5f272d1a2acad2eb7d9896888f0d277bafaa38162799066460e41776e413c7
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"picomatch","vendor":"micromatch","versions":[{"status":"affected","version":">= 4.0.0, < 4.0.4"},{"status":"affected","version":">= 3.0.0, < 3.0.2"},{"status":"affected","version":"< 2.3.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ac0672aa52e8151635177b9d2459c7e67647f95d4b98814a8617e2545ee37991 · sha256:2cf21a2bb35115ed… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ac0672aa52e8151635177b9d2459c7e67647f95d4b98814a8617e2545ee37991 · sha256:2cf21a2bb35115ed… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1321","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac0672aa52e8151635177b9d2459c7e67647f95d4b98814a8617e2545ee37991 · sha256:2cf21a2bb35115ed… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903","tags":["x_refsource_MISC"],"url":"https://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac0672aa52e8151635177b9d2459c7e67647f95d4b98814a8617e2545ee37991 · sha256:2cf21a2bb35115ed… · /containers/cna/references/1
{"name":"https://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p","tags":["x_refsource_CONFIRM"],"url":"https://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac0672aa52e8151635177b9d2459c7e67647f95d4b98814a8617e2545ee37991 · sha256:2cf21a2bb35115ed… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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