🛡️ CVE-2026-50133 — hugo

🟡 CVSS 6.1 — Medium ✅ No Known Exploit CWE-79 NVD
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Hugo: XSS via text/html content files

Commit: [e41a06447d](https://github.com/gohugoio/hugo/commit/e41a06447d) — _Disallow HTML content by default_

Affected versions: all Hugo versions prior to v0.162.0.

Fixed in: v0.162.0.

Severity: Low to Medium, depending on threat model. Not an issue if you fully trust every file under /content and every content adapter you load.

Description. 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 — for example, a CMS-backed editor, a content adapter pulling from an external API, or an automated import pipeline — could therefore be served stored cross-site scripting.

Mitigation. v0.162.0 introduces a security.allowContent whitelist with text/html denied by default. Sites that intentionally author HTML content can opt back in:

```toml

[security]

allowContent = ['.*']

```

This only affects pages whose source file (or content adapter output) declares an HTML media type; Markdown, AsciiDoc, Org, Pandoc and reStructuredText content is unaffected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2026-50133 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2026-50133 is recorded against 2 packages.

  • github.com/gohugoio/hugo
  • hugo (fixed in 0.162.0)

Timeline and source

Published on 16 June 2026 and last revised on 7 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity Medium
CVSS Score 6.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE CWE-79
Public Exploit ✅ No
Source NVD
Published 2026-06-16
Updated 2026-08-12
Modified 2026-07-07

Affected Packages

Software From version Fixed in
github.com/gohugoio/hugo — —
hugo — 0.162.0

Similar Threats

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