CVE-2026-20779

Gitea TOTP single-use enforcement defect allows OTP replay

At a glance

Severity: HIGH 7.1
EPSS: EPSS 0.49 % · percentile 42 (2026-10-27)
State: PUBLISHED
Published: 2026-07-03
Updated: 2026-07-07
Assigner: Gitea
NVD status: Deferred

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N	Gitea
CVSS 3.1	HIGH 7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N	NVD · 88ee5874-cf24-4952-aea0-31affedb7ff2 (Secondary)

Weaknesses (CWE)

CWE-294

Advisories

GHSA-gx3v-q759-g323 — Gitea: TOTP TOCTOU race on web 2FA paths + missing replay check on Basic-Auth `X-Gitea-OTP` surface
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

European references

ENISA EUVD · EUVD-2026-41613
GCVE · GCVE-0-2026-20779

Affected products

Product	Versions
Gitea · Gitea Open Source Git Server	affected 1.5.0 < 1.26.3

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD