What is CVE-2026-35166?

CVE-2026-35166 is a medium-severity vulnerability in Gohugo Hugo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-06.

How severe is CVE-2026-35166?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Gohugo Hugo

CVE-2026-35166

Hugo is a static site generator. From 0.60.0 to before 0.159.2, links and image links in the default markdown to HTML renderer are not properly escaped. Hugo users who trust their Markdown content or have custom render hooks for links and…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Gohugo Hugo
Gohugoio Hugo — versions >= 0.60.0, < 0.159.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-35166?: CVE-2026-35166 is a medium-severity vulnerability in Gohugo Hugo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-06.
How severe is CVE-2026-35166?: Medium severity. CVSS v3 base score is 5.4 out of 10.