CVE-2026-50133 Hugo: XSS via text/html content files
Attackers can inject malicious scripts via HTML content files in Hugo, leading to stored XSS when sites ingest untrusted HTML.
- 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-2026-50133?
CVE-2026-50133 is a medium-severity cross-site scripting vulnerability in gohugoio hugo, published on 6 Jul 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. Prior to 0.162.0, Hugo accepts content files in several markup formats. Files mapped to the text/html media type (typically .html files under /content, or pages produced by a content adapter that sets content.mediaType = "text/html") had their body emitted verbatim into the rendered page. A site that ingests HTML content from an untrusted source could therefore be served stored cross-site scripting. This vulnerability is fixed in 0.162.0.
Weakness: CWE-79
Which versions are affected by CVE-2026-50133?
3 open source packages ship an affected version, including github.com/gohugoio/hugo. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/gohugoio/hugo Go | All versions | 0.162.0 |
github.com/gohugoio/hugo Go | All versions | 0.162.0 |
github.com/gohugoio/hugo Go | All versions | 0.162.0 |
Products include Gohugo Hugo.
How do I fix CVE-2026-50133?
Upgrade github.com/gohugoio/hugo to 0.162.0 or later.
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-2026-50133 being exploited?
There is no known exploitation of CVE-2026-50133 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-2026-50133, GHSA-c54g-xjwj-8g82, GO-2026-5313, JLSEC-2026-794, UBUNTU-CVE-2026-50133.