CVE-2026-28744: Gitea: Git Smart HTTP Skips Repository Token Scopes for Bearer Tokens

Gitea v1.26.1 enforces repository-scoped access-token permissions on repository operations. In the Git Smart HTTP path, however, this check runs only when the token is presented via HTTP Basic authentication — CheckRepoScopedToken() returns early unless ctx.IsBasicAuth is true — so the same token sent as Authorization: Bearer <token> bypasses the scope check entirely.

As a result, a PAT or OAuth2 token presented as a Bearer credential can clone or fetch private repositories without the read:repository scope, and likewise reach the Git push without write:repository.