CVE-2026-58403

Name	CVE-2026-58403
Description	Hugo is a static site generator. From v0.123.0 through v0.163.0, Hugo's virtual filesystem is designed so that files under a mount cannot reach outside the mount tree, but a regression caused RootMappingFs.statRoot to call Stat, which follows symlinks, instead of Lstat, so a direct os.ReadFile "somefile" where somefile was a symlink pointing outside the mount would return the target's contents. This effectively let a symlink planted inside a theme or local mount read arbitrary files reachable to the user running hugo. This issue is fixed in v0.163.1.
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
hugo (PTS)	bullseye	0.80.0-6	vulnerable
	bullseye (security)	0.80.0-6+deb11u1	vulnerable
	bookworm	0.111.3-1	vulnerable
	trixie	0.131.0-1	vulnerable
	forky	0.161.1-1	vulnerable
	sid	0.162.1-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
hugo	source	(unstable)	(unfixed)

Notes

https://github.com/gohugoio/hugo/security/advisories/GHSA-c3wq-j5vh-68rc
https://github.com/gohugoio/hugo/pull/15020
Fixed by: https://github.com/gohugoio/hugo/commit/cf9c8f93ca2a2838ce378f9e36d052ac2f79e229 (v0.163.1)