All vulnerabilities
CVE-2026-103667GHSA-7cq7-4v93-8wjm

Gitea container registry stored XSS through blob media type

Gitea Gitea
Open in ThreatlineRecord JSON
CVSS
5.4Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.19%Chance of exploitation activity in the next 30 days, higher than 8% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in28.0.0Fixed versionGitHub
Published6 Oct 2026Updated 7 Oct 2026CVE List

What fixes it

  • 28.0.0gitea.dev, goGitHubgo get gitea.dev@v28.0.0

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Gitea's container registry served blob downloads with a Content-Type taken from the media type declared in pushed image manifests, without a Content-Disposition or restrictive content security policy. A user who can push container images can publish a blob containing HTML and JavaScript with a text/html media type. When a victim who is authenticated to the instance opens the blob URL in a browser, the script runs on the Gitea origin and can perform actions as the victim, such as creating API tokens.

Text from CVE List

Affected versions 2

  • Giteaaffected: all versions through 1.27.3CVE List
  • gitea.dev, go<= 1.27.3GitHub

References 4