Hugo versions from v0.161.0 through v0.165.0 run Node.js tools (css.PostCSS, css.TailwindCSS, js.Babel) under the Node.js permission model to restrict file system reads to the project directory and configured mounts. Because the Node.js permission model validates only the lexical path and follows symbolic links that point outside the allowed set, Hugo did not detect symlinks escaping the sandbox. An attacker who can contribute content to a Hugo project (for example via a pull request) can commit a symlink such as assets/css/x.css -> /etc/passwd together with a PostCSS plugin that reads it, allowing any file readable by the Hugo build process to be disclosed and potentially embedded in the published site. This affects builds using the default security configuration; projects that do not invoke Node.js tools are unaffected. Fixed in v0.166.0, which scans allowed paths and fails the build when a symbolic link resolves outside them.
References
| Link | Resource |
|---|---|
| https://github.com/gohugoio/hugo/security/advisories/GHSA-x3mx-cm49-8m9c | Vendor Advisory |
| https://www.vulncheck.com/advisories/hugo-0.161.0-to-0.165.0-arbitrary-file-read-via-symlinks | Third Party Advisory |
Configurations
History
29 Sep 2026, 19:08
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/gohugoio/hugo/security/advisories/GHSA-x3mx-cm49-8m9c - Vendor Advisory | |
| References | () https://www.vulncheck.com/advisories/hugo-0.161.0-to-0.165.0-arbitrary-file-read-via-symlinks - Third Party Advisory | |
| First Time |
Gohugo
Gohugo hugo |
|
| CPE | cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:* |
26 Sep 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-09-26 14:16
Updated : 2026-09-30 16:17
NVD link : CVE-2026-100690
Mitre link : CVE-2026-100690
CVE.ORG link : CVE-2026-100690
JSON object : View
Products Affected
gohugo
- hugo
CWE
CWE-59
Improper Link Resolution Before File Access ('Link Following')