CVE-2026-58402

EUVD-2026-41904
Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class="language-…" data-lang="…" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out of the attribute and injects a live script element. This issue is fixed in 0.163.3.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 6.98%
Affected Products (NVD)
VendorProductVersion
gohugohugo
0.60.0 ≤
𝑥
< 0.163.3
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
hugo
bookworm
postponed
bullseye
postponed
bullseye (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
hugo
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
Common Weakness Enumeration
References
https://github.com/gohugoio/hugo/commit/ce1a7e0bce3713af40496ded3c2c0ceeed49231d
https://github.com/gohugoio/hugo/pull/15051
https://github.com/gohugoio/hugo/releases/tag/v0.163.3
https://github.com/gohugoio/hugo/security/advisories/GHSA-q76j-gcg9-vxc6