Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109574Hugo before v0.167.0 Path Traversal via css.Sass Import Fallback

Medium 5.5

In plain English

A medium-severity path traversal in hugo from gohugoio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.1%top 96.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Hugo before v0.167.0 contains a path traversal vulnerability in css.Sass that allows malicious themes or modules to read files outside the project root through the Sass compiler's import fallback. Attackers can ship stylesheets with relative, absolute, or symlinked @import or @use targets to compile readable files into the published site CSS.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	hugo	no fix listed	DEBIAN-CVE-2026-109574
Debian:13	hugo	no fix listed	DEBIAN-CVE-2026-109574
Debian:14	hugo	0.167.0-1	DEBIAN-CVE-2026-109574
Ubuntu:22.04:LTS	hugo	no fix listed	UBUNTU-CVE-2026-109574
Ubuntu:26.04:LTS	hugo	no fix listed	UBUNTU-CVE-2026-109574
Ubuntu:26.10	hugo	no fix listed	UBUNTU-CVE-2026-109574

Affected products (as reported)

Vendor	Product	Versions
gohugoio	hugo	0 – before 0.167.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-3jfr-vjcq-7jvf) vendor-advisory
VulnCheck Advisory: Hugo before v0.167.0 Path Traversal via css.Sass Import Fallback third-party-advisory