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TI-2026-26051 Aliases CVE-2026-33671GHSA-c2c7-rcm5-vvqj

Picomatch has a ReDoS vulnerability via extglob quantifiers

Priority LOW 39CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 4 fixed, 31 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-1333.

Summary

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 request throttling and input validation for any endpoint that accepts glob patterns.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0042 36th percentileScored 2026-11-07
Fix Partial picomatch (micromatch): 4.0.4, 3.0.2, 2.3.2picomatch (npm): 4.0.4, 3.0.2, 2.3.2Red Hat: 4 advisoriesRed Hat: 4 fixed, 31 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
micromatchpicomatch4.0.0 to before 4.0.4; 3.0.0 to before 3.0.2; before 2.3.24.0.4, 3.0.2, 2.3.2Patch availableCNA
—picomatch (npm)4.0.0 to before 4.0.44.0.4Patch availableGHSA-c2c7-rcm5-vvqj
—picomatch (npm)3.0.0 to before 3.0.23.0.2Patch availableGHSA-c2c7-rcm5-vvqj
—picomatch (npm)before 2.3.22.3.2Patch availableGHSA-c2c7-rcm5-vvqj
  • picomatch Vendormicromatch Affected 4.0.0 to before 4.0.4; 3.0.0 to before 3.0.2; before 2.3.2 Fixed in 4.0.4, 3.0.2, 2.3.2 Patch available CNA
  • picomatch (npm) Vendor— Affected 4.0.0 to before 4.0.4 Fixed in 4.0.4 Patch available GHSA-c2c7-rcm5-vvqj
  • picomatch (npm) Vendor— Affected 3.0.0 to before 3.0.2 Fixed in 3.0.2 Patch available GHSA-c2c7-rcm5-vvqj
  • picomatch (npm) Vendor— Affected before 2.3.2 Fixed in 2.3.2 Patch available GHSA-c2c7-rcm5-vvqj

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jonschlinkert:picomatch:*:*:*:*:*:node.js:*:*before 2.3.2; 3.0.0 to before 3.0.2; 4.0.0 to before 4.0.4Vulnerablemicromatch
  • cpe:2.3:a:jonschlinkert:picomatch:*:*:*:*:*:node.js:*:* Versions before 2.3.2; 3.0.0 to before 3.0.2; 4.0.0 to before 4.0.4 Vulnerable ·micromatch

Remediation

  • Fix · CNA picomatch (micromatch) Fixed in 4.0.4, 3.0.2, 2.3.2
  • Fix · GHSA-c2c7-rcm5-vvqj picomatch (npm) Fixed in 4.0.4 Advisory →
  • Fix · GHSA-c2c7-rcm5-vvqj picomatch (npm) Fixed in 3.0.2 Advisory →
  • Fix · GHSA-c2c7-rcm5-vvqj picomatch (npm) Fixed in 2.3.2 Advisory →

Red Hat 4 advisories

  • RHSA-2026:86618 Released 2026-10-21 · Red Hat rating Critical
    New container image: rhceph-9.2
    • Red Hat Ceph Storage 9.2 registry.redhat.io/rhceph/rhceph-9-rhel10
  • RHSA-2026:56928 Released 2026-08-19 · Red Hat rating Important
    Red Hat OpenShift Data Foundation 4.22.2 security, enhancement & bug fix update
    • Red Hat Openshift Data Foundation 4.22 registry.redhat.io/odf4/cephcsi-rhel9, registry.redhat.io/odf4/cephcsi-rhel9-operator, registry.redhat.io/odf4/devicefinder-rhel9 +25
  • RHSA-2026:56431 Released 2026-08-18 · Red Hat rating Important
    Red Hat OpenShift Data Foundation 4.18.27 security, enhancement & bug fix update
    • Red Hat Openshift Data Foundation 4.18 registry.redhat.io/odf4/cephcsi-rhel9, registry.redhat.io/odf4/cephcsi-rhel9-operator, registry.redhat.io/odf4/mcg-core-rhel9 +16
Show 1 more Red Hat advisories
  • RHSA-2026:34342 Released 2026-07-01 · Red Hat rating Critical
    Cluster Observability Operator 1.5.0
    • Cluster Observability Operator 1.5 registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9, registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9, registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9 +9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Cryostat 4AffectedNo fix yet: Fix deferred
Migration Toolkit for Applications 8AffectedNo fix yet: Fix deferred
Node HealthCheck OperatorAffectedNo fix yet: Fix deferred
Red Hat 3scale API Management Platform 2AffectedNo fix yet: Fix deferred
Red Hat AMQ Broker 7AffectedNo fix yet: Fix deferred
Red Hat Advanced Cluster Security 4AffectedNo fix yet: Fix deferred
Red Hat Ansible Automation Platform 2AffectedNo fix yet: Fix deferred
Red Hat Build of KeycloakAffectedNo fix yet: Fix deferred
Red Hat Build of Podman DesktopAffectedNo fix yet: Fix deferred
Red Hat Data Grid 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Fuse 7AffectedNo fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 8AffectedNo fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform Expansion PackAffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Dev SpacesAffectedNo fix yet: Fix deferred
Red Hat OpenShift GitOpsAffectedNo fix yet: Fix deferred
Red Hat Process Automation 7AffectedNo fix yet: Fix deferred
Red Hat Quay 3AffectedNo fix yet: Fix deferred
Red Hat Satellite 6AffectedNo fix yet: Fix deferred
Red Hat Single Sign-On 7AffectedNo fix yet: Fix deferred
Red Hat Trusted Artifact SignerAffectedNo fix yet: Fix deferred
Red Hat build of Apache Camel - HawtIO 4AffectedNo fix yet: Fix deferred
Red Hat build of Apicurio Registry 2AffectedNo fix yet: Fix deferred
Red Hat build of OptaPlanner 8AffectedNo fix yet: Fix deferred
streams for Apache Kafka 2AffectedNo fix yet: Fix deferred
streams for Apache Kafka 3AffectedNo fix yet: Fix deferred
Cluster Observability Operator 1.5Fixed RHSA-2026:34342
Red Hat Ceph Storage 9.2Fixed RHSA-2026:86618
Red Hat Openshift Data Foundation 4.18Fixed RHSA-2026:56431
Red Hat Openshift Data Foundation 4.22Fixed RHSA-2026:56928
Not affected: 4 products
  • Cluster Observability Operator 1.5
  • Red Hat Ceph Storage 9.2
  • Red Hat Openshift Data Foundation 4.18
  • Red Hat Openshift Data Foundation 4.22

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33671
  2. 2026-10-03 Alias added: GHSA-c2c7-rcm5-vvqj
  3. 2026-10-21 Fix available: RHSA-2026:86618 · Red Hat
  4. 2026-10-21 Fix available: Red Hat Ceph Storage 9.2 · Red Hat
  5. 2026-11-06 Fix available: Cluster Observability Operator 1.5 · Red Hat

References

  • TI-2026-26052 Picomatch: Method Injection in POSIX Character Classes causes incorrect Glob Matching CVSS 3.1MEDIUM 5.3

Sources