CVE-2026-58440 Gitea: Webhooks created by a collaborator keep firing after their repo access is revoked → ongoing real-time exfiltration of private repo content
Attackers can exfiltrate private repository content via webhooks that continue firing after collaborator access is revoked due to incomplete cleanup.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-58440?
CVE-2026-58440 is a medium-severity missing authorization vulnerability in Gitea Open Source Git Server, published on 13 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Webhooks created by a collaborator keep firing after their repo access is revoked → ongoing real-time exfiltration of private repo content (incomplete revocation cleanup in `DeleteCollaboration`)
Weakness: CWE-284
Which versions are affected by CVE-2026-58440?
3 open source packages ship an affected version, including gitea.dev.
| Package | Affected | Fixed in |
|---|---|---|
gitea.dev Go | All versions | 1.27.0 |
gitea.dev Go | All versions | 1.27.0 |
gitea.dev Go | All versions | 1.27.0 |
How do I fix CVE-2026-58440?
Upgrade gitea.dev to 1.27.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-58440 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58440 exists.
Sources
Also known as GHSA-66m4-5jjr-2rg5, GO-2026-6033.