mediumVulnerability
GHSA-q76j-gcg9-vxc6
Hugo's default code-block renderer wrote the Markdown code-fence language / 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 is not an issue if you fully trust every file under /content and every content adapter you load.
Properties
- ghsa_id
- GHSA-q76j-gcg9-vxc6
- severity
- medium
- summary
- Hugo: XSS via unescaped code-fence language in default code block renderer
- cve_id
- GHSA-q76j-gcg9-vxc6
- is_ghsa_only
- true
- ghsa_published
- 2026-06-19T17:45:27Z
- source_url
- https://github.com/advisories/GHSA-q76j-gcg9-vxc6
- ghsa_updated
- 2026-06-19T17:45:28Z
Related Entities (4)
HAS_WEAKNESS (1)
→[Weakness]Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
REPORTED_BY (1)
→[Source]GitHub Advisory Database
VULNERABLE_TO (1)
←[Software]go/github.com/gohugoio/hugo
AFFECTS (1)
→[Software]go/github.com/gohugoio/hugo
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