CVE-2026-106073

Name	CVE-2026-106073
Description	A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync()` without the required read permission checks. This is an incomplete fix of CVE-2026-21715, which only covered `fs.realpathSync.native()`. As a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories. This vulnerability affects Node.js 26.x, 24.x, and 22.x.
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	1151688, 1151859

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nodejs (PTS)	bookworm	18.20.4+dfsg-1~deb12u2	vulnerable
	bookworm (security)	18.20.4+dfsg-1~deb12u3	vulnerable
	trixie	20.19.2+dfsg-1+deb13u2	vulnerable
	trixie (security)	20.19.2+dfsg-1+deb13u3	vulnerable
	forky, sid	24.22.2+dfsg+~cs24.19.2-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nodejs	source	(unstable)	24.22.1+dfsg+~cs24.19.2-1			1151688, 1151859

Notes

https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#permission-model-bypass-with-fsrealpathsync-cve-2026-106073---low
Fixed by: https://github.com/nodejs/node/commit/50ab804edc82648b2b7681bda2f9af9316dfdfbb (v22.23.4)