What’s Vulnerable › Vulnerabilities

CVE-2026-101023: Gitea OAuth2 refresh token grant accepts access tokens

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-13
• Weakness: CWE-287

Description

Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the `refresh_token` grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoever holds such an access token could keep access beyond the token's original lifetime.

Affected products

• Gitea Open Source Git Server: before 28.1.0 — fixed in 28.1.0

How to fix

Upgrade to a fixed version: Gitea Open Source Git Server 28.1.0. Check the vendor advisory for mitigations.

References

• https://blog.gitea.com/release-of-28.1.0/
• https://github.com/go-gitea/gitea/pull/39501
• https://github.com/go-gitea/gitea/pull/39507
• https://github.com/go-gitea/gitea/releases/tag/v28.1.0
• https://github.com/go-gitea/gitea/security/advisories/GHSA-469m-x4mw-38r3

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