CVE-2026-118394 Gitea CVE debrief

Who should care

Administrators and users of the affected product should assess their exposure and update to the latest version if necessary. This includes reviewing system configurations, verifying the authenticity of tokens, and ensuring that patches are applied. Security teams should prioritize this vulnerability based on its potential impact on organization and team data.

Why it matters

CVE-2026-118394 is a vulnerability in the OAuth2 userinfo endpoint of an affected product, which could allow unauthorized disclosure of organization and team names and memberships. The issue has been fixed in a recent update. Users should assess their exposure and update to the latest version if necessary.

• Potential unauthorized disclosure of organization and team names and memberships
• Need to verify if the authenticating token's scope is properly used
• Possible update to the latest version to fix the issue

Technical summary

The OAuth2 userinfo endpoint incorrectly used the scope of the authenticating token, potentially disclosing organization and team names and memberships. The issue has been fixed in a recent update. The vulnerability arises from a logic error in handling the authentication token's scope, which could lead to unauthorized access to sensitive information. Users should update to the latest version to mitigate this vulnerability. The fix involves using the correct scope of the authenticating token to limit the information disclosed.

Defensive priority

Medium

Recommended defensive actions

• Assess exposure to the vulnerable OAuth2 userinfo endpoint
• Verify if the authenticating token's scope is properly used
• Update to the latest version if necessary
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. The vendor, Gitea, has released an advisory and a patch for the issue. Further verification is needed to ensure that the patch is applied and that the vulnerability is fully mitigated. The disclosure is limited to the owner's organization and team names and memberships; no repository content is exposed.

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.