CVE-2026-93749

Name	CVE-2026-93749
Description	source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.
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	1148404

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-postcss (PTS)	bookworm	8.4.20+~cs8.0.23-1+deb12u1	vulnerable
	trixie	8.4.49+~cs9.2.32-1	vulnerable
	forky, sid	8.5.28+~cs10.2.24-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
node-postcss	source	(unstable)	(unfixed)			1148404

Notes

[trixie] - node-postcss <no-dsa> (Minor issue)
[bookworm] - node-postcss <postponed> (Minor issue)
https://github.com/7rulnik/source-map-js/issues/76
node-postcss embeds and provides node-source-map-js