🛡️ CVE-2026-50135 — hugo

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-59 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Hugo: Symlink confinement bypass in resources.Get

Commit: [f8b5fa09a6](https://github.com/gohugoio/hugo/commit/f8b5fa09a6) — _Fix prevention of direct symlink reads in resources.Get_

Affected versions: v0.123.0 through v0.161.1. Earlier versions are not affected.

Fixed in: v0.162.0.

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 resources.Get "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.

Mitigation. v0.162.0 calls LstatIfPossible and rejects symlinked entries with os.ErrNotExist, matching the behaviour of pre-v0.123.0 releases and of the directory-walking code paths.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-50135 is classified as CWE-59: Link Following. The software follows symbolic or hard links without verifying their target, so a planted link can redirect an operation to a sensitive file.

Affected software

CVE-2026-50135 is recorded against 2 packages.

  • github.com/gohugoio/hugo
  • hugo (from 0.123.0 up to 0.161.1)

Timeline and source

Published on 16 June 2026 and last revised on 7 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE CWE-59
Public Exploit ✅ No
Source NVD
Published 2026-06-16
Updated 2026-08-12
Modified 2026-07-07

Affected Packages

Software From version Fixed in
github.com/gohugoio/hugo — —
hugo 0.123.0 0.161.1

Similar Threats

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