CVE-2026-100694 Hugo before 0.166.0 Cross-Site Scripting via text/org
Attackers can inject scripts into Hugo-generated sites via unescaped Org Mode content, affecting visitors' browsers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-100694?
CVE-2026-100694 is a medium-severity cross-site scripting vulnerability in gohugoio hugo, published on 26 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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 = ['.*'].
Weakness: CWE-79
Which versions are affected by CVE-2026-100694?
It affects 1 product.
Products include Gohugo Hugo.
How do I fix CVE-2026-100694?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-100694 being exploited?
There is no known exploitation of CVE-2026-100694 in the wild and no public exploit code.
Other vulnerabilities in gohugoio hugo
- CVE-2026-75926 Hugo 0.162.0 to 0.164.x - Node Permission Model Bypass via Default TailwindCSS Child-Process Grant
- CVE-2026-100690 Hugo v0.161.0 to v0.165.0 Arbitrary File Read via Symlinks
- CVE-2026-100692 Hugo before v0.166.0 Path Traversal via Symlinked Mount Roots
- CVE-2026-100693 Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass
- CVE-2020-26284 Hugo can execute a binary from the current directory on Windows
Sources
Also known as DEBIAN-CVE-2026-100694, GHSA-98xc-jpvp-56pj, GHSA-pq74-mj4h-cjq2, MINI-ch86-gfj3-2xxh, MINI-w4p4-4725-c49r, UBUNTU-CVE-2026-100694.