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[ CVE-2026-102278 · Published 28 Sep 2026 ]

brace-expansion: DoS via uncontrolled recursion on nested brace groups causing stack exhaustion

CVSS 7.5 EPSS <1%Fix available

[ Description ]Official description

The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.20, 2.1.6, 3.0.8, and 5.0.11, deeply nested brace groups cause expand_() to recurse once per nesting level at comma-member and single-set expansion sites, exhausting the native stack before output limits can apply and potentially terminating the Node.js process. expand_ performs uncontrolled recursion for nested brace alternatives and single-part sets. deeply nested brace groups supplied as an untrusted pattern. expand_ is affected. expand is affected. Comma members is affected. Single set is affected. native stack exhaustion during nested sub-expansion. process-terminating denial of service. This issue is fixed in versions 1.1.20, 2.1.6, 3.0.8, and 5.0.11.

[ Fixes ]Fixes and patches

  • brace-expansion 5.0.11Fixed version · GitHub Advisories · npm package brace-expansion: upgrade to 5.0.11 or later (affected >= 4.0.0, < 5.0.11)
  • brace-expansion 3.0.8Fixed version · GitHub Advisories · npm package brace-expansion: upgrade to 3.0.8 or later (affected >= 3.0.0, < 3.0.8)
  • brace-expansion 2.1.6Fixed version · GitHub Advisories · npm package brace-expansion: upgrade to 2.1.6 or later (affected >= 2.0.0, < 2.1.6)
  • brace-expansion 1.1.20Fixed version · GitHub Advisories · npm package brace-expansion: upgrade to 1.1.20 or later (affected < 1.1.20)

[ Packages ]Affected open-source packages

[ References ]References