CVE-2026-78231 Gitea CVE debrief

Who should care

Defenders responsible for Gitea instances, especially those with OpenID sign-in enabled, should assess exposure and verify internal service reachability. They should prioritize verifying exposure and assessing internal service reachability due to the blind SSRF vulnerability in Gitea's OpenID assertion verification. This includes verifying if the Gitea instance is exposed, assessing internal HTTP services, and restricting OpenID provider endpoints to trust

Why it matters

Defenders should prioritize verifying exposure and assessing internal service reachability due to the blind SSRF vulnerability in Gitea's OpenID assertion verification.

• Verify internal service exposure and potential interactions.
• Assess OpenID provider endpoint trust and restrict to trusted sources.
• Monitor Gitea server logs for potential SSRF activity.
• Update Gitea to a non-affected version if available.

Technical summary

The Gitea server is vulnerable to blind SSRF during OpenID assertion verification. An attacker can control the destination and part of the form body, allowing interaction with internal HTTP services reachable from the Gitea server. The response is not returned to the attacker, making it a blind SSRF issue. The impact depends on the services and network addresses the server can reach. Defenders should prioritize verifying exposure and assessing internal service reachability due to this vulnerability. The CVE record and source item provide details on the blind SSRF vulnerability in Gitea.

Defensive priority

Defenders should prioritize verifying exposure and assessing internal service reachability.

Recommended defensive actions

• Verify if Gitea instance is exposed to the vulnerability by checking the version and OpenID sign-in configuration.
• Assess internal HTTP services reachable from the Gitea server and monitor for potential interactions.
• Restrict OpenID provider endpoints to trusted sources and limit internal service exposure.
• Update Gitea to version 1.26.5 or later if available.
• 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.

Evidence notes

The CVE record and source item provide details on the blind SSRF vulnerability in Gitea. The issue allows an attacker to interact with internal HTTP services reachable from the Gitea server during OpenID assertion verification.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.