TOTP Single-Use Enforcement Defect in Gitea by Gitea
CVE-2026-20779

7.1HIGH

Key Information:

Vendor

Gitea

Status
Gitea Open Source Git Server
Vendor
CVE Published:
3 July 2026

What is CVE-2026-20779?

Versions of Gitea from 1.5.0 up to 1.26.3 are affected by a vulnerability that permits a valid Time-Based One-Time Password (TOTP) to be reused, undermining the integrity of two-factor authentication mechanisms. This flaw enables an attacker to exploit the Basic Auth X-Gitea-OTP path by reusing a TOTP code, potentially leading to unauthorized access and a breach of secure transactions.

Affected Version(s)

Gitea Open Source Git Server 1.5.0 < 1.26.3

References

https://github.com/go-gitea/gitea/security/advisories/GHS...
vendor-advisory
https://github.com/go-gitea/gitea/pull/38151
patch
https://github.com/go-gitea/gitea/releases/tag/v1.26.3
release-notes

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kript0r3x
.