CVE-2026-13149

Name	CVE-2026-13149
Description	brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1141325

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-brace-expansion (PTS)	bullseye	2.0.0-1	vulnerable
	bookworm	2.0.1-2	vulnerable
	trixie	2.0.1+~1.1.0-2	vulnerable
	forky, sid	2.0.3+~1.1.2-3	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
node-brace-expansion	source	(unstable)	(unfixed)			1141325

Notes

[trixie] - node-brace-expansion <no-dsa> (Minor issue)
[bookworm] - node-brace-expansion <postponed> (Minor issue)
[bullseye] - node-brace-expansion <postponed> (Minor issue)
https://github.com/juliangruber/brace-expansion/commit/c7e33ec13ac1a684c116720843ce24e208611754