CVE-2026-78231GHSA-8vmh-w35x-73qr
Gitea blind SSRF through OpenID assertion verification
Gitea Gitea
CVSS
5.3MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.26%Chance of exploitation activity in the next 30 days, higher than 16% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 1.27.0code.gitea.io/gitea, goGitHub
go get code.gitea.io/gitea@v1.27.0
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
When OpenID sign-in is enabled, Gitea processes unauthenticated assertion parameters and sends an HTTP POST request to the caller-supplied OpenID provider endpoint during verification. An attacker controls the destination and much of the form body, allowing interaction with internal HTTP services reachable from the Gitea server. The response is not returned to the attacker, so the issue is blind SSRF; its impact depends on the services and network addresses the server can reach.
Text from CVE List
Affected versions 2
- Giteaaffected: all versions through 1.26.4CVE List
- code.gitea.io/gitea, go<= 1.26.4GitHub