Medium 5.9Published Jul 6, 2026

CVE-2026-58403Hugo symlink confinement bypass in os.ReadFile

Updated under an hour ago (Oct 26, 2026, 7:20 AM ET)

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It affects gohugoio hugo and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for gohugoio hugo

Exploited in the last 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.

CVSS: 5.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-59
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

gohugoio hugo gohugoio:hugo (from the name)	from 0.123.0, < 0.163.1	CNA record
gohugo hugo gohugo:hugo	from 0.123.0 before 0.163.1	NVD

References

https://github.com/gohugoio/hugo/security/advisories/GHSA-c3wq-j5vh-68rcx-refsource-confirm, vendor-advisory
https://github.com/gohugoio/hugo/pull/15020x-refsource-misc, issue-tracking
https://github.com/gohugoio/hugo/commit/cf9c8f93ca2a2838ce378f9e36d052ac2f79e229x-refsource-misc, patch
https://github.com/gohugoio/hugo/releases/tag/v0.163.1x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.