CVE-2026-100691

Name
CVE-2026-100691
Description
Hugo versions 0.75.0 through 0.165.x contain a stored cross-site scripting vulnerability: the syntax highlighter does not escape the `lineAnchors` option before passing it to Chroma, which writes the value verbatim into the `id` and `href` attributes of the generated line-number markup. A crafted `lineAnchors` value supplied as a Markdown code fence attribute (or passed to the `highlight` template function) results in unescaped HTML in the rendered page, allowing arbitrary JavaScript to execute in the browsers of visitors to the generated site. This affects sites that build and publish Markdown from untrusted contributors; Hugo's security model otherwise considers content trusted input. Fixed in 0.166.0, where the `lineAnchors` value is HTML-escaped before being passed to Chroma.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
disclosure@vulncheck.com https://github.com/gohugoio/hugo/security/advisories/GHSA-q4xf-287f-98r8
disclosure@vulncheck.com https://www.vulncheck.com/advisories/hugo-before-0.166.0-stored-xss-via-lineanchors-code-block-option

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:* hugo >= 0.75.0 < 0.166.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
hugo edge-community 0.164.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.160.1-r2 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.160.1-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.160.1-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.159.0-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.159.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.158.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.157.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.155.3-r3 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.152.2-r3 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.152.2-r2 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.152.2-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.152.2-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.152.1-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.151.0-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.151.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.150.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.148.2-r2 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.148.2-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.148.2-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.148.1-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.148.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.147.9-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.147.9-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.147.7-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.147.7-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.147.2-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.145.0-r2 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.145.0-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.145.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.144.0-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.144.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.143.0-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.143.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.142.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.141.0-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.141.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.140.1-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo edge-community 0.139.0-r0 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo 3.24-community 0.160.1-r2 Thomas Boerger <thomas@webhippie.de> possibly vulnerable
hugo 3.24-community 0.160.1-r1 Thomas Boerger <thomas@webhippie.de> possibly vulnerable