Vulnerability · Published Sep 18, 2026 · Assigned by VulnCheck
CVE-2026-93687braces through 3.0.3 Stack Overflow via Deeply Nested Patterns
High 7.5
In plain English
A high-severity security flaw in braces from micromatch. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.8%top 44.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-braces | no fix listed | DEBIAN-CVE-2026-93687 |
| Debian:13 | node-braces | no fix listed | DEBIAN-CVE-2026-93687 |
| Debian:14 | node-braces | no fix listed | DEBIAN-CVE-2026-93687 |
| Ubuntu:22.04:LTS | node-braces | no fix listed | UBUNTU-CVE-2026-93687 |
| Ubuntu:24.04:LTS | node-braces | no fix listed | UBUNTU-CVE-2026-93687 |
| Ubuntu:26.04:LTS | node-braces | no fix listed | UBUNTU-CVE-2026-93687 |
| Ubuntu:26.10 | node-braces | no fix listed | UBUNTU-CVE-2026-93687 |
| npm | braces | no fix listed | GHSA-vfj7-8cjw-p6xm |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| micromatch | braces | 0 – through 3.0.3 |
Weakness: CWE-674 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Issue #70 issue-tracking
- https://github.com/micromatch/braces product
- https://github.com/micromatch/braces/blob/3.0.3/lib/compile.js#L49-L53 technical-description
- https://github.com/micromatch/braces/blob/3.0.3/lib/expand.js#L102-L105 technical-description
- https://github.com/micromatch/braces/blob/3.0.3/lib/parse.js#L38-L40 technical-description
- VulnCheck Advisory: braces through 3.0.3 Stack Overflow via Deeply Nested Patterns third-party-advisory
- https://github.com/micromatch/braces/issues/73#issuecomment-5996574974
- https://github.com/advisories/ghsa-vfj7-8cjw-p6xm