Vulnerability in Gohugo Hugo
CVE-2026-58403
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Gohugo Hugo
- Gohugoio Hugo — versions >= 0.123.0, < 0.163.1
Weakness classification (CWE)
References
- github.com/gohugoio/hugo/security/advisories/GHSA-c3wq-j5vh-68rc (Vendor Advisory)
- github.com/gohugoio/hugo/pull/15020 (Issue Tracking)
- github.com/gohugoio/hugo/commit/cf9c8f93ca2a2838ce378f9e36d052ac2f79e229 (Patch)
- github.com/gohugoio/hugo/releases/tag/v0.163.1 (Release Notes)
Frequently asked questions
- What is CVE-2026-58403?
- CVE-2026-58403 is a medium-severity vulnerability in Gohugo Hugo, classified under Improper Link Resolution Before File Access. CVSS score: 6.5/10. Published 2026-07-06.
- How severe is CVE-2026-58403?
- Medium severity. CVSS v3 base score is 6.5 out of 10.