CVE-2026-70406 Gitea private comparison disclosure with public-only tokens
Attackers with public-only tokens can access private repository commit history and diffs by exploiting missing authorization checks in comparison helpers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70406?
CVE-2026-70406 is a medium-severity missing authorization vulnerability in Gitea, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Gitea's shared comparison helper omits the token repository-access check used when updating pull requests. A public-only token with read:repository scope can route a comparison or pull request creation through a public base repository and retrieve commit history and diffs from a private head repository accessible to the token owner. This bypasses the token's public-only restriction; it does not remove the account's underlying repository permission checks.
Weakness: CWE-863
Which versions are affected by CVE-2026-70406?
How do I fix CVE-2026-70406?
No fix has been published for CVE-2026-70406 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-70406 being exploited?
There is no known exploitation of CVE-2026-70406 in the wild and no public exploit code.
Sources
Also known as GHSA-m78w-jjjx-gp8r.