Vulnerability · Published Oct 6, 2026 · Assigned by Gitea

CVE-2026-103667Gitea container registry stored XSS through blob media type

Medium 5.4

In plain English

A medium-severity cross-site scripting in Gitea from Gitea. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 91.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Gitea	Gitea	0 – through 1.27.3

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

GitHub Security Advisory GHSA-7cq7-4v93-8wjm vendor-advisory
Fix: go-gitea/gitea pull request #39398 patch
Gitea 28.0.0 release announcement release-notes
go-gitea/gitea v28.0.0 release release-notes