CVE-2026-27780
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
A vulnerability in Gitea before version 1.26.0 fails to close the connection on bufio.Scanner errors while processing pre-receive hook input, allowing oversized input to bypass branch-protection checks.
Risk Assessment
An attacker can bypass branch protection rules, leading to unauthorized changes in the repository, code integrity compromise, and potential injection of malicious code.
Recommendation
Immediately upgrade Gitea to version 1.26.0 or later, which includes a fix that closes the connection on scanner errors.
Other vulnerabilities in Gitea
See all- CVE-2026-60004CriticalActively exploited
Gitea before version 1.27.1 allows remote code execution via the diffpatch API through Git hook installation.
- CVE-2026-58508Critical
Two SSRF vulnerabilities in Gitea migration/mirror (DNS rebinding + missing re-validation).
- CVE-2026-58443Critical
Public-only repository tokens can update private PR head branches.
- CVE-2026-58433Critical
The team-repository linking endpoint bypasses the RepoAdminChangeTeamAccess organization setting. This means a user without proper permissions can change repository-team assignments.
- CVE-2026-56750Critical
Theft of the Remember-Me token in Gitea does not invalidate the attacker's session, allowing continued unauthorized access.
- CVE-2026-56654Critical
The vulnerability allows privilege escalation via access token scope escalation in the API.
- CVE-2026-56443Critical
A public-only scope token can bypass restrictions on limited-visibility owners (Repository and Package categories) — residual after CVE-2026-25714 / PR #37118.
- CVE-2026-55982Critical
The OIDC userinfo endpoint returns identity claims without enforcing API token scopes.
- CVE-2026-58426Critical
The vulnerability in Gitea Actions Artifacts V4 stems from HMAC ambiguity in signed URLs, allowing cross-repository artifact read and cross-task upload-state write.
- CVE-2026-27771High
A vulnerability in Gitea up to version 1.26.1 is caused by insufficient permission checks for Composer package source links. This can expose private or internal package source information.
Original NVD description (English source)
Gitea versions before 1.26.0 do not fail closed on bufio.Scanner errors while processing pre-receive hook input, allowing oversized input to bypass branch-protection checks.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS