XSS in Gohugo 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 · last modified .
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
EPSS: 0.002 (8.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-pq74-mj4h-cjq2) (vendor-advisory, Mitigation, Vendor Advisory)
- VulnCheck Advisory: Hugo before 0.166.0 Cross-Site Scripting via text/org (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-100694?
- CVE-2026-100694 is a medium-severity vulnerability in Gohugo 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.