CVE-2026-27657 Gitea CVE debrief

Who should care

Administrators and users of Gitea instances should be aware of this vulnerability. Updating to version 1.25.5 or later is recommended. Gitea administrators should review their instances for potential exposure and take necessary actions to mitigate the vulnerability. Security teams should also be aware of this vulnerability and monitor for potential attacks.

Technical summary

The vulnerability allows an attacker to modify another user's primary email address in Gitea versions before 1.25.5. This could lead to phishing or account takeover attempts. The CVSS score for this vulnerability is 7.5, indicating a high severity level. The vulnerability is caused by insufficient validation of user input, allowing an attacker to change another user's primary email address. Gitea administrators should review their instances for potential exposure and take necessary actions to mitigate the vulnerability. Security teams should also be aware of this vulnerability and monitor for potential attacks. Affected Gitea instances may require additional authentication measures for email changes and compensating controls while remediation is scheduled and verified.

Defensive priority

High priority for Gitea administrators to update to version 1.25.5 or later and monitor for potential attacks.

Recommended defensive actions

• Update Gitea to version 1.25.5 or later
• Monitor user account activity for suspicious email changes
• Implement additional authentication measures for email changes
• 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 was published on 2026-07-03T21:16:58.720Z and last modified on 2026-07-07T18:16:37.613Z. The NVD entry is currently Deferred. This vulnerability affects Gitea versions prior to 1.25.5. The CVE record was sourced from nvd_modified. The NVD entry provides additional details on the vulnerability. However, due to limited information, defenders should verify the affected scope and severity with the official Gitea advisory.

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.