Security readout for executives and security teams
Plain-English summary
CVE-2026-27904 is a denial-of-service flaw in the npm minimatch library. Specially crafted glob patterns can make JavaScript regex processing stall for seconds to minutes, consuming application capacity. Business urgency depends on whether untrusted users can supply patterns or inputs processed by minimatch.
Executive priority
Treat as a high-priority availability risk for JavaScript services that process user-controlled glob patterns. Patch quickly in exposed or multi-tenant environments. Lower priority if minimatch is only used in trusted build-time workflows.
Technical view
Before fixed releases, nested extglob constructs in minimatch generate regular expressions with nested unbounded quantifiers, causing catastrophic backtracking in V8. The default minimatch() API is affected without special options. The issue is classified as CWE-1333 with CVSS 7.5, impacting availability only.
Likely exposure
Node.js applications or tooling using affected minimatch versions are exposed, especially where glob patterns or matched input can be influenced by users, tenants, CI jobs, plugins, or external configuration.
Exploitation context
The source bundle does not report active exploitation, and KEV is false. Exploitation would be availability-focused: forcing excessive regex evaluation through crafted glob use. No confidentiality or integrity impact is indicated.
Researcher notes
The advisory states small nested extglob patterns can trigger severe backtracking in V8 through the default API. Evidence is limited to the CVE and GitHub advisory in the provided bundle; no public exploitation or additional mitigations are cited.
Mitigation direction
- Upgrade minimatch to a fixed version for the installed major line.
- Use 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, or 3.1.4.
- Audit transitive dependencies that bundle or depend on minimatch.
- Restrict or validate untrusted glob patterns where immediate upgrade is not possible.
- Monitor vendor advisory updates for any additional guidance.
Validation and detection
- Inventory package-lock, yarn.lock, pnpm-lock, and SBOM data for minimatch versions.
- Confirm all affected version ranges are upgraded or removed.
- Identify application paths where users can submit glob patterns or matching targets.
- Prioritize internet-facing, multi-tenant, CI/CD, and plugin-driven services.
- Review runtime monitoring for CPU spikes tied to pattern matching workflows.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-1333: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-27904 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/isaacs/minimatch/security/advisories/GHSA-23c5-xmqv-rm74CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Inefficient Regular Expression Complexity
Inefficient Regular Expression Complexity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.