Vulnerability · Published Oct 6, 2026 · Assigned by Gitea

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

Critical 9.1

In plain English

A critical-severity improper authentication in Gitea from Gitea. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.4%top 70.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Gitea	Gitea	0 – through 28.0.0

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

GitHub Security Advisory GHSA-469m-x4mw-38r3 vendor-advisory
Fix: go-gitea/gitea pull request #39501 patch
Fix backport to release/v28: go-gitea/gitea pull request #39507 patch
Gitea 28.1.0 release announcement release-notes
go-gitea/gitea v28.1.0 release release-notes