CVE-2026-58402

mediumCVSS 5.4covered by 1 sourcefirst seen 2026-07-06

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.

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Exploitation outlook

Low exploitation risk0.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-58402: Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer…nvd · 2026-07-06

External references

NVD record for CVE-2026-58402

CVE.org record

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