Vulnerability in Micromatch Braces
CVE-2026-93687
braces through 3.0.3 contains a stack overflow vulnerability in the recursive AST walkers that lack depth guards. Attackers can supply deeply nested brace patterns under the character limit to exhaust the call stack and terminate the Node.js process with an uncaught RangeError.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/micromatch/braces/issues/70 (issue-tracking)
- github.com/micromatch/braces (product)
- github.com/micromatch/braces/blob/3.0.3/lib/compile.js (technical-description)
- github.com/micromatch/braces/blob/3.0.3/lib/expand.js (technical-description)
- github.com/micromatch/braces/blob/3.0.3/lib/parse.js (technical-description)
- www.vulncheck.com/advisories/braces-through-3.0.3-stack-overflow-via-deeply-nes… (third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-93687?
- CVE-2026-93687 is a high-severity vulnerability in Micromatch Braces, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-18.
- How severe is CVE-2026-93687?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-93687 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.