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Vulnerability record · CVE-2026-20779 · published 3 July 2026

CVE-2026-20779: Authentication bypass by capture-replay vulnerability

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.

7.1 CVSS 3.1 High EPSS 0.48% · top 61.0% CWE-294 · Authentication bypass by capture-replay Deferred
7.1CVSS 3.1 base score
0.48%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
7 Jul 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

References

LinkTags
https://blog.gitea.com/release-of-1.26.3-and-1.26.4/
https://github.com/go-gitea/gitea/pull/38151
https://github.com/go-gitea/gitea/releases/tag/v1.26.3
https://github.com/go-gitea/gitea/security/advisories/GHSA-gx3v-q759-g323
https://github.com/go-gitea/gitea/security/advisories/GHSA-gx3v-q759-g323

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-20779), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.