XSS in Gohugoio Hugo
CVE-2026-100694
Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/gohugoio/hugo/security/advisories/GHSA-pq74-mj4h-cjq2 (vendor-advisory)
- www.vulncheck.com/advisories/hugo-before-0.166.0-cross-site-scripting-via-text-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100694?
- CVE-2026-100694 is a medium-severity vulnerability in Gohugoio Hugo, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-26.
- How severe is CVE-2026-100694?
- Medium severity. CVSS v3 base score is 6.1 out of 10.