CVE-2026-20779: gitea gitea open source git server Authentication Bypass by Capture-replay
CVSS: 7.1v3.1HighDeferred
AliasesGHSA-gx3v-q759-g323GO-2026-6057
Published 03-07-2026Last modified 07-07-2026
Vulnerability summary
CVE-2026-20779 is a high (CVSS 7.1) Authentication Bypass by Capture-replay vulnerability in gitea gitea open source git server. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.1% of scored vulnerabilities.
CVSS score
7.1/10
010
High · v3.1 (CVE.org)EPSS score
0.48%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 03-07-2026PublishedVulnerability first disclosed.
- 07-07-2026Last modifiedVulnerability information updated.
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 metrics
3 scores · 3 sources · 1 versionHigh 7.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:NSourcesAll 3 agree
- OSV · GoEcosystem advisory · calculated7.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
- NVDNIST7.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
EPSS trend
Probability
0.48%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
0.00 pp
From 0.48% on 19-09-2026
19-09-202619-10-2026
EPSS score0.48%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Code.gitea.io1 product
- gitea≥ 1.5.0, < 1.26.3
Gitea1 product
- gitea open source git server≥ 1.5.0, < 1.26.3
2 vendors · 2 products
References
8 links- blog.gitea.com/release-of-1.26.3-and-1.26.4/Release Notes
- github.com/go-gitea/giteaPACKAGE