CVE-2026-27606

Name	CVE-2026-27606
Description	Rollup is a module bundler for JavaScript. Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker to control output filenames (e.g., via CLI named inputs, manual chunk aliases, or malicious plugins) and use traversal sequences (`../`) to overwrite files anywhere on the host filesystem that the build process has permissions for. This can lead to persistent Remote Code Execution (RCE) by overwriting critical system or user configuration files. Versions 2.80.0, 3.30.0, and 4.59.0 contain a patch for the issue.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-rollup (PTS)	bullseye	2.38.4-1	vulnerable
	bookworm	3.15.0-1+deb12u1	vulnerable
	forky, trixie	3.29.5-1	vulnerable
	sid	3.29.5-3	vulnerable

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

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

Notes

https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc
Fixed by: https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2 (v4.59.0)
Fixed by: https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e (v3.30.0)
Fixed by: https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3 (v2.28.0)