CVE-2026-58403: Gohugo Hugo

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Gohugo Hugo: from 0.123.0, before 0.163.1 (fixed in 0.163.1)

Published 2026-07-06. Last modified 2026-07-08.