Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
High, CVSS 7.5amended

minimatch has ReDoS: matchOne() combinatorial backtracking via multiple non-adjacent GLOBSTAR segments

CVE-2026-27903GHSA-7r86-cg39-jmmj

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (minimatch 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, 3.1.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

  • npm minimatch

    Affected
    >= 10.0.0, < 10.2.3>= 9.0.0, < 9.0.7>= 8.0.0, < 8.0.6>= 7.0.0, < 7.4.8>= 6.0.0, < 6.2.2>= 5.0.0, < 5.1.8>= 4.0.0, < 4.2.5< 3.1.3
    Fixed in
    7.4.8, 8.0.6, 4.2.5, 3.1.3, 5.1.8, 10.2.3, 6.2.2, 9.0.7

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
  • CVE-2026-27903: 0.58% estimated exploitation activity in the next 30 days; percentile 47.53 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary matchOne() performs unbounded recursive backtracking when a glob pattern contains multiple non-adjacent (GLOBSTAR) segments and the input path does not match. The time complexity is O(C(n, k)) -- binomial -- where n is the number of path segments and k is the number of globstars. With k=11 and n=30, a call to the default minimatch() API stalls for roughly 5 seconds. With k=13, it exceeds 15 seconds. No memoization or call budget exists to bound this behavior. --- Details The vulnerable loop is in matchOne() at src/index.ts#L960: When a GLOBSTAR is encountered, the function tries to match the remaining pattern against every suffix of the remaining file segments. Each multiplies the number of recursive calls by the number of remaining segments. With k non-adjacent globstars and n file segments, the total number of calls is C(n, k). There is no depth counter, visited-state cache, or budget limit applied to this recursion. The call tree is fully explored before returning false on…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-7r86-cg39-jmmj

  2. Revision 1 · created ·

    Published from osv record GHSA-7r86-cg39-jmmj

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-27903

Advisory: minimatch has ReDoS: matchOne() combinatorial backtracking via multiple non-adjacent GLOBSTAR segments
IDs: CVE-2026-27903, GHSA-7r86-cg39-jmmj
Record: https://patchnext.com/advisories/cve-2026-27903 (revision 2, source checked 26 Oct 2026, 12:42 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: minimatch 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, 3.1.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm minimatch: affected >= 10.0.0, < 10.2.3; >= 9.0.0, < 9.0.7; >= 8.0.0, < 8.0.6; >= 7.0.0, < 7.4.8; >= 6.0.0, < 6.2.2; >= 5.0.0, < 5.1.8; >= 4.0.0, < 4.2.5; < 3.1.3; fixed in 7.4.8, 8.0.6, 4.2.5, 3.1.3, 5.1.8, 10.2.3, 6.2.2, 9.0.7

## Suggested inspection (read-only)
- `npm ls minimatch --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on minimatch.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-7r86-cg39-jmmj (OSV record GHSA-7r86-cg39-jmmj lists affected ranges: npm minimatch >=10.0.0 =9.0.0 =8.0.0 =7.0.0 =6.0.0 =5.0.0 =4.0.0 =0 <3.1.3 (fixed))
- Verified: https://github.com/advisories/GHSA-7r86-cg39-jmmj (GitHub-reviewed advisory GHSA-7r86-cg39-jmmj lists affected ranges: npm minimatch >=10.0.0 =9.0.0 =8.0.0 =7.0.0 =6.0.0 =5.0.0 =4.0.0 =0 <3.1.3)

Commands are suggestions: review each one before running it.

Loading voting…