juliangruber brace-expansion index.js expand redos

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

• juliangruber brace-expansion

  • 1.1.12, 2.0.2, 3.0.1, 4.0.1not affected
  • 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, 1.1.7, 1.1.8, 1.1.9, 1.1.10, 1.1.11 … (+4)affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-102278brace-expansion: DoS via uncontrolled recursion on nested brace groups causing stack exhaustion
  30Monitor
• CVE-2026-102276brace-expansion: DoS via uncontrolled recursion in parseCommaParts causing stack exhaustion
  30Monitor
• CVE-2026-69152brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation
  30Monitor

Published before and after this one in the same product

• Later →CVE-2026-33750Mar 27, 2026 · brace-expansion: Zero-step sequence causes process hang and memory exhaustion
  30Monitor
• Later →CVE-2026-45149May 29, 2026 · brace-expansion: Large numeric range defeats documented `max` DoS protection
  30Monitor
• Later →CVE-2026-13149Jun 30, 2026 · brace-expansion through 5.0.6 is vulnerable to denial of service.
  30Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.