GO-2026-6057 Gitea: TOTP TOCTOU race on web 2FA paths + missing replay check on Basic-Auth `X-Gitea-OTP` surface in code.gitea.io/gitea

Gitea: TOTP TOCTOU race on web 2FA paths + missing replay check on Basic-Auth X-Gitea-OTP surface in code.gitea.io/gitea...

GHSA-GX3V-Q759-G323 Gitea: TOTP TOCTOU race on web 2FA paths + missing replay check on Basic-Auth `X-Gitea-OTP` surface

Summary I'm reporting two related TOTP one-time-use defects in Gitea that survive the CVE-2021-45331 fix. The 2018 fix PR 3878 introduced the TwoFactor.LastUsedPasscode field and added an in-memory inequality check on the web 2FA login path. That check works correctly in the single-request case,...

CVE-2026-20779 Gitea TOTP single-use enforcement defect allows OTP replay

Gitea versions from 1.5.0 before 1.26.3 have a TOTP single-use enforcement defect that allows a valid TOTP code to be accepted more than once across web two-factor authentication flows and the Basic Auth X-Gitea-OTP path...

CVE-2026-20779 Gitea TOTP single-use enforcement defect allows OTP replay

Gitea versions from 1.5.0 before 1.26.3 have a TOTP single-use enforcement defect that allows a valid TOTP code to be accepted more than once across web two-factor authentication flows and the Basic Auth X-Gitea-OTP path...

CVE-2026-20779

Gitea prior to 1.26.3 (versions from 1.5.0 up to

CVE-2026-20779: Authentication Bypass by Capture-replay

Gitea versions from 1.5.0 before 1.26.3 have a TOTP single-use enforcement defect that allows a valid TOTP code to be accepted more than once across web two-factor authentication flows and the Basic Auth X-Gitea-OTP path...