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CVE Vulnerability Details :
CVE-2026-26247
PUBLISHED
More InfoOfficial Page
Assigner-Gitea
Assigner Org ID-88ee5874-cf24-4952-aea0-31affedb7ff2
View Known Exploited Vulnerability (KEV) details
Published At-03 Jul, 2026 | 20:19
Updated At-03 Jul, 2026 | 20:19
Rejected At-
▼CVE Numbering Authority (CNA)
Gitea OAuth2 PKCE S256 challenges are not enforced during token exchange

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.

Affected Products
Vendor
Gitea
Product
Gitea Open Source Git Server
Default Status
unaffected
Versions
Affected
  • From 0 before 1.25.5 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-284CWE-284
Type: CWE
CWE ID: CWE-284
Description: CWE-284
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
reporter
Aisle Research
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/go-gitea/gitea/pull/36462
patch
https://github.com/go-gitea/gitea/pull/36477
patch
https://github.com/go-gitea/gitea/releases/tag/v1.25.5
release-notes
https://blog.gitea.com/release-of-1.25.5/
release-notes
Hyperlink: https://github.com/go-gitea/gitea/pull/36462
Resource:
patch
Hyperlink: https://github.com/go-gitea/gitea/pull/36477
Resource:
patch
Hyperlink: https://github.com/go-gitea/gitea/releases/tag/v1.25.5
Resource:
release-notes
Hyperlink: https://blog.gitea.com/release-of-1.25.5/
Resource:
release-notes
Details not found