CVE-2026-78231 Gitea blind SSRF through OpenID assertion verification
Attackers can trigger blind SSRF via OpenID verification to interact with internal services when OpenID sign-in is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78231?
CVE-2026-78231 is a medium-severity server-side request forgery vulnerability in Gitea, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-78231?
How do I fix CVE-2026-78231?
No fix has been published for CVE-2026-78231 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-78231 being exploited?
There is no known exploitation of CVE-2026-78231 in the wild and no public exploit code.
Sources
Also known as GHSA-8vmh-w35x-73qr.