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PatchSiren cyber security CVE debrief

CVE-2026-26232 Gitea CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-03T21:16:58.313Z and has not been modified since then. Gitea versions before 1.25.5 have a critical vulnerability related to OAuth2 authorization code expiry and single-use behavior during token exchange. This could potentially allow attackers to bypass authorization mechanisms. Administrators and users of Gitea instances, particularly those using OAuth2 for authentication, should be aware of this critical vulnerability and take immediate action to mitigate it.

Vendor
Gitea
Product
Gitea Open Source Git Server
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-03
Original CVE updated
2026-07-07
Advisory published
2026-07-03
Advisory updated
2026-07-07

Who should care

Administrators and users of Gitea instances, particularly those using OAuth2 for authentication, should be aware of this critical vulnerability. Gitea instance administrators should update to version 1.25.5 or later to mitigate this critical vulnerability. Review and adjust OAuth2 configuration, and monitor for suspicious authentication activity.

Technical summary

Gitea versions before 1.25.5 do not consistently enforce OAuth2 authorization code expiry and single-use behavior during token exchange, potentially allowing attackers to bypass authorization mechanisms. This critical vulnerability affects Gitea instances using OAuth2 for authentication. The CVE record and NVD entry provide limited details; further investigation is needed to fully understand the vulnerability's impact and affected scope.

Defensive priority

High priority for Gitea instance administrators to update to version 1.25.5 or later to mitigate this critical vulnerability.

Recommended defensive actions

  • Update Gitea to version 1.25.5 or later
  • Review and adjust OAuth2 configuration
  • Monitor for suspicious authentication activity
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • 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 NVD entry provide limited details; further investigation is needed to fully understand the vulnerability's impact and affected scope. Gitea's OAuth2 authorization code expiry and single-use behavior during token exchange require verification. Defenders should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance. Evidence limits suggest additional research may be necessary to confirm exposure and impact.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-03T21:16:58.313Z and has not been modified since then.