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CVE-2026-33671

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:509dbda9beb1a96121669220ff6a10397500bc5b5278202e5d2a03a4746a2eb5
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:v2:205d5f0e02a32a938e56208a439300bb75c90425315719b92410e48146138e5b · sha256:fc8026984dc0ec20… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:205d5f0e02a32a938e56208a439300bb75c90425315719b92410e48146138e5b · sha256:fc8026984dc0ec20… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:205d5f0e02a32a938e56208a439300bb75c90425315719b92410e48146138e5b · sha256:fc8026984dc0ec20… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/micromatch/picomatch/commit/5eceecd27543b8e056b9307d69e105ea03618a7d","tags":["x_refsource_MISC"],"url":"https://github.com/micromatch/picomatch/commit/5eceecd27543b8e056b9307d69e105ea03618a7d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:205d5f0e02a32a938e56208a439300bb75c90425315719b92410e48146138e5b · sha256:fc8026984dc0ec20… · /containers/cna/references/1
{"name":"https://github.com/micromatch/picomatch/security/advisories/GHSA-c2c7-rcm5-vvqj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/micromatch/picomatch/security/advisories/GHSA-c2c7-rcm5-vvqj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:205d5f0e02a32a938e56208a439300bb75c90425315719b92410e48146138e5b · sha256:fc8026984dc0ec20… · /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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