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HIGH

CVE-2026-27904

minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions

CVSS v3

7.5

HIGH

EPSS Score

0.5 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

poc

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • minimatchnpmall versions · fixed in 3.1.4
  • nodejsAlmaLinux:9all versions · fixed in 1:20.20.2-1.module_el9.7.0+226+88d36870and 2 other packages
  • nodejsAlmaLinux:8all versions · fixed in 1:20.20.2-1.module_el8.10.0+4165+3f200bdaand 3 other packages
  • nodejs-docsAlmaLinux:10all versions · fixed in 1:22.22.2-1.el10_1
  • nodejs-docsAlmaLinux:9all versions · fixed in 1:20.20.2-1.module_el9.7.0+224+0af7cc6b
  • nodejs-libsAlmaLinux:8all versions · fixed in 1:22.22.2-1.module_el8.10.0+4158+e796f37f
  • nodejs-nodemonAlmaLinux:9all versions · fixed in 3.0.1-1.module_el9.5.0+125+8dc38870
  • nodejs-nodemonAlmaLinux:8all versions · fixed in 3.0.1-1.module_el8.10.0+3982+85c136aa

5 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-27904 Red Hat Product Security785 products fixed · 74 known affected

    minimatch: Minimatch: Denial of Service via catastrophic backtracking in glob expressions

    openshift-logging/cluster-logging-operator-bundle as a component of Logging Subsystem for Red Hat OpenShift · openshift-logging/cluster-logging-rhel9-operator as a component of Logging Subsystem for Red Hat OpenShift · openshift-logging/elasticsearch-operator-bundle as a component of Logging Subsystem for Red Hat OpenShift

  • RHSA-2026:83622 Red Hat Product Security68 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.17.28 security, enhancement & bug fix update

  • RHSA-2026:83619 Red Hat Product Security64 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.16.36 security, enhancement & bug fix update

  • RHSA-2026:65126 Red Hat Product Security23 products fixed

    Red Hat Security Advisory: RHOAI 2.25.11 - Red Hat OpenShift AI

  • RHSA-2026:51349 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: General availability of the satellite/iop-host-inventory-frontend-rhel9 container image

  • RHSA-2026:50300 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Migration Toolkit for Applications

29 more advisories

Full record on NVD

Description

minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Prior to version 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4, nested `*()` extglobs produce regexps with nested unbounded quantifiers (e.g. `(?:(?:a|b)*)*`), which exhibit catastrophic backtracking in V8. With a 12-byte pattern `*(*(*(a|b)))` and an 18-byte non-matching input, `minimatch()` stalls for over 7 seconds. Adding a single nesting level or a few input characters pushes this to minutes. This is the most severe finding: it is triggered by the default `minimatch()` API with no special options, and the minimum viable pattern is only 12 bytes. The same issue affects `+()` extglobs equally. Versions 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4 fix the issue.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-02-26
Last Modified
2026-02-27

Frequently asked questions

What is CVE-2026-27904?

minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Prior to version 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4, nested `*()` extglobs produce regexps with nested unbounded quantifiers (e.g. `(?:(?:a|b)*)*`), which exhibit catastrophic backtracking in V8. With a 12-byte pattern `*(*(*(a|b)))` and an 18-byte non-matching input, `minimatch()` stalls for over 7 seconds. Adding a single nesting level or a few input characters pushes this to minutes. This is the most severe finding: it is triggered by the default `minimatch()` API with no special options, and the minimum viable pattern is only 12 bytes. The same issue affects `+()` extglobs equally. Versions 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4 fix the issue.

Is CVE-2026-27904 actively exploited?

A proof-of-concept exploit exists for CVE-2026-27904, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-27904?

CVE-2026-27904 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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