Picomatch: Method Injection in POSIX Character Classes causes incorrect Glob Matching

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-33672 · CVE overview and exploitation status

EUVD-2026-16438

GHSA-3v7f-55p6-f55p

cve-program · CVE-2026-33672

• https://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p
• https://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903

euvd · EUVD-2026-16438

• https://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p
• https://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903

nvd · CVE-2026-33672

• https://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903
• https://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p

osv · GHSA-3v7f-55p6-f55p

• https://github.com/micromatch/picomatch/security/advisories/GHSA-3v7f-55p6-f55p
• https://nvd.nist.gov/vuln/detail/CVE-2026-33672
• https://github.com/micromatch/picomatch/commit/4516eb521f13a46b2fe1a1d2c9ef6b20ddc0e903
• https://github.com/micromatch/picomatch

• 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`, spe… · Advisory content revised · 15 Nov 2026