Answer in brief
CVE-2026-26247 records a Critical severity (CVSS 9.1) vulnerability in Gitea OAuth2 PKCE S256 challenges are not enforced during token exchange. The current sources do not mark it as known exploited. The current feed maps Gitea/Gitea Open Source Git Server (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Gitea/Gitea Open Source Git Server (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Gitea/Gitea Open Source Git Servergeneric | >=0 <1.25.5 | 1.25.5 |
Published upstream
Jul 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-26247 records a Critical severity (CVSS 9.1) vulnerability in Gitea OAuth2 PKCE S256 challenges are not enforced during token exchange. The current sources do not mark it as known exploited. The current feed maps Gitea/Gitea Open Source Git Server (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Gitea/Gitea Open Source Git Server (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Gitea/Gitea Open Source Git Servergeneric | >=0 <1.25.5 | 1.25.5 |
Published upstream
Jul 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.