Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gohugo | Hugo | >= 0.60.0, < 0.163.3 |
Related Weaknesses (CWE)
References
- https://github.com/gohugoio/hugo/commit/ce1a7e0bce3713af40496ded3c2c0ceeed49231dPatch
- https://github.com/gohugoio/hugo/pull/15051Issue Tracking
- https://github.com/gohugoio/hugo/releases/tag/v0.163.3Release Notes
- https://github.com/gohugoio/hugo/security/advisories/GHSA-q76j-gcg9-vxc6Vendor Advisory
FAQ
What is CVE-2026-58402?
CVE-2026-58402 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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="…" wrap...
How severe is CVE-2026-58402?
CVE-2026-58402 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-58402?
Check the references section above for vendor advisories and patch information. Affected products include: Gohugo Hugo.