CVE-2026-93687: Uncontrolled Recursion in micromatch braces
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.
AI Analysis
Technical Summary
The braces package versions up to and including 3.0.3 contain a stack overflow vulnerability caused by uncontrolled recursion in the recursive AST walkers, which lack depth guards. An attacker can exploit this by providing deeply nested brace patterns within the character limit, leading to exhaustion of the call stack and termination of the Node.js process with an uncaught RangeError. This vulnerability is identified as CVE-2026-93687 and has a CVSS 4.0 base score of 8.7, indicating high severity.
Potential Impact
Exploitation of this vulnerability results in denial of service by crashing the Node.js process due to a stack overflow triggered by deeply nested brace patterns. There is no indication of privilege escalation, data disclosure, or code execution beyond process termination.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted or deeply nested brace patterns in the affected versions of the braces package.
CVE-2026-93687: Uncontrolled Recursion in micromatch braces
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.
CVSS v4.0
Score 8.7high
Affected software
micromatch
braces
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The braces package versions up to and including 3.0.3 contain a stack overflow vulnerability caused by uncontrolled recursion in the recursive AST walkers, which lack depth guards. An attacker can exploit this by providing deeply nested brace patterns within the character limit, leading to exhaustion of the call stack and termination of the Node.js process with an uncaught RangeError. This vulnerability is identified as CVE-2026-93687 and has a CVSS 4.0 base score of 8.7, indicating high severity.
Potential Impact
Exploitation of this vulnerability results in denial of service by crashing the Node.js process due to a stack overflow triggered by deeply nested brace patterns. There is no indication of privilege escalation, data disclosure, or code execution beyond process termination.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted or deeply nested brace patterns in the affected versions of the braces package.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-18T14:39:01.117Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aad598855bf5e2cf52e3991
Added to database: 09/18/2026, 15:32:24 UTC
Last enriched: 09/18/2026, 15:46:36 UTC
Last updated: 09/19/2026, 01:34:20 UTC
Views: 7
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