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CVE-2026-50133 gohugoio CVE debrief

CVE-2026-50133 is a stored cross-site scripting vulnerability in Hugo, a static site generator. Prior to version 0.162.0, Hugo accepts content files in several markup formats. Files mapped to the text/html media type 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.

Vendor
gohugoio
Product
hugo
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-06
Original CVE updated
2026-07-08
Advisory published
2026-07-06
Advisory updated
2026-07-08

Who should care

Users of Hugo, a static site generator, who ingest HTML content from untrusted sources should be aware of this vulnerability. This includes developers, web administrators, and security teams responsible for managing and securing websites generated with Hugo.

Technical summary

The vulnerability exists because Hugo, prior to version 0.162.0, does not properly sanitize HTML content from untrusted sources when it is emitted into the rendered page. This allows an attacker to inject malicious JavaScript code, potentially leading to stored cross-site scripting attacks. The vulnerability has a CVSS score of 5.1 and is classified as MEDIUM severity. A site that ingests HTML content from an untrusted source could therefore be served stored cross-site scripting. Files mapped to the text/html media type had their body emitted verbatim into the rendered page.

Defensive priority

Medium priority should be given to updating Hugo to version 0.162.0 or later, especially for sites that ingest HTML content from untrusted sources. Additionally, site administrators should review their content ingestion processes to ensure proper sanitization of user-supplied content.

Recommended defensive actions

  • Update Hugo to version 0.162.0 or later
  • Review content ingestion processes to ensure proper sanitization of user-supplied content
  • Monitor site activity for suspicious behavior
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-06T20:16:37.043Z and was last modified on 2026-07-07T15:16:47.597Z. The NVD entry is currently Undergoing Analysis. The vulnerability is fixed in Hugo version 0.162.0.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-06T20:16:37.043Z and has not been modified since then. The NVD entry is currently Undergoing Analysis.