PT-2026-55980 · Gohugoio · Hugo

Bep · Published 2026-07-06 · Updated 2026-07-06 · CVE-2026-58403

Mitre

CVSS v4.0

5.9

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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.

Fix

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

CVE-2026-58403

Affected Products

Hugo

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-58403 · Security Note
• https://github.com/gohugoio/hugo/pull/15020 · Note
• https://github.com/gohugoio/hugo/commit/cf9c8f93ca2a2838ce378f9e36d052ac2f79e229 · Note
• https://github.com/gohugoio/hugo/releases/tag/v0.163.1 · Note
• https://github.com/gohugoio/hugo/security/advisories/GHSA-c3wq-j5vh-68rc · Note