Access Control Bypass Affecting gitea.dev/routers/web/auth package, versions <1.25.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published7 Jul 2026
- disclosed3 Jul 2026
- creditUnknown
Introduced: 3 Jul 2026
CVE-2026-26247 Â (opens in a new tab)How to fix?
Upgrade gitea.dev/routers/web/auth to version 1.25.5 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass due to improper enforcement of the PKCE S256 challenge during the OAuth2 token exchange process. An attacker can obtain access tokens without providing the expected code verifier by bypassing the intended verification step.