CVE-2026-27771 Gitea Composer package source links use insufficient permission checks
Attackers can access private or internal Composer package source information due to insufficient permission checks in Gitea.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27771?
CVE-2026-27771 is a high-severity missing authorization vulnerability in Gitea Open Source Git Server, published on 3 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Gitea versions up to and including 1.26.1 have insufficient permission checks for Composer package source links, which can expose private or internal package source information.
Weakness: CWE-862
Which versions are affected by CVE-2026-27771?
3 open source packages ship an affected version, including code.gitea.io/gitea.
| Package | Affected | Fixed in |
|---|---|---|
code.gitea.io/gitea Go | All versions | 1.26.2 |
code.gitea.io/gitea Go | All versions | 1.26.2 |
code.gitea.io/gitea Go | All versions | 1.26.2 |
How do I fix CVE-2026-27771?
Upgrade code.gitea.io/gitea to 1.26.2 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-27771 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27771 exists.
Public exploit code: 1 Nuclei template and 2 proofs of concept on GitHub.
Sources
Also known as GHSA-8qw8-rq86-9pc2, GO-2026-6017.