PT-2026-53774 · Go · Github.Com/Gohugoio/Hugo
Published
2026-06-19
·
Updated
2026-06-19
CVSS v4.0
6.0
Medium
| Vector | AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N |
Affected versions: v0.123.0 through v0.163.0. Earlier versions are not affected.
Fixed in: v0.163.1.
Severity: Medium. Requires the attacker to be able to place (or convince a site author to place) a symlink inside a mounted directory — for example, inside a locally-vendored theme under
themes/. Themes mounted as Go modules from GitHub have symlinks stripped on download and are not affected. Multi-directory walks (e.g. content/asset walking) were not affected either; only direct lookups via resources.Get followed symlinks.Description. Hugo's virtual filesystem is designed so that files under a mount cannot reach outside the mount tree. A regression introduced in v0.123.0 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.Fix
Link Following
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Weakness Enumeration
Related Identifiers
Affected Products
Github.Com/Gohugoio/Hugo