Critical RCE Vulnerability in Gitea (CVE-2026-60004) Exposes Servers to Arbitrary Command Execution
A severe remote code execution (RCE) vulnerability, tracked as CVE-2026-60004 (CVSS 9.8), has been discovered in Gitea, affecting versions 1.17 through 1.27.0. The flaw, patched in Gitea 1.27.1, allows attackers to execute arbitrary shell commands on vulnerable servers by exploiting the diffpatch endpoint, which processes repository patches using Git commands.
Exploitation Mechanism
The vulnerability stems from how Gitea handles temporary bare repository clones when applying patches. An attacker with write access to a repository can craft a malicious Git hook (e.g., hooks/post-index-change) in the repository root, which Git treats as an executable hook. By submitting a specially crafted patch twice, the attacker triggers Git’s three-way merge fallback (introduced in Git 2.32+), causing the hook to execute during index updates.
Key requirements for exploitation include:
- Git 2.32 or later installed on the target system.
- The diffpatch route enabled in Gitea.
- A writable and executable temporary filesystem on the server.
Notably, the attack does not require an outbound network connection, as command output can be exfiltrated via Git objects and authenticated Smart HTTP.
Impact & Risks
Successful exploitation grants attackers the ability to run commands under the Gitea service account’s permissions, potentially leading to:
- Theft of sensitive data, including
app.iniconfigurations, database credentials, OAuth tokens, and environment variables. - Compromise of mounted repositories and integration credentials.
- Full server takeover, depending on the service account’s privileges and server isolation.
While exploitation requires write access, publicly accessible Gitea instances with open registration are at heightened risk, as unauthenticated users could register an account, create a repository, and trigger the exploit.
Mitigation & Response
Gitea has released version 1.27.1 to address the flaw. Until upgrades are applied, administrators are advised to:
- Disable or restrict the diffpatch functionality.
- Disable public registration and limit repository write permissions.
- Review Gitea service account privileges and enforce least-privilege access.
- Monitor Git and Gitea logs for unusual patch submissions or unexpected hook activity.
The vulnerability underscores the importance of prompt patching and access controls, particularly for self-hosted Gitea deployments. Recent updates have included multiple security fixes, reinforcing the need for proactive vulnerability management.
Source: https://cybersecuritynews.com/gitea-rce-vulnerability/
Gitea TPRM report: https://www.rankiteo.com/company/commitgo
"id": "com1785313421",
"linkid": "commitgo",
"type": "Vulnerability",
"date": "7/2026",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"{'affected_entities': [{'customers_affected': 'Users of Gitea versions 1.17 '
'through 1.27.0',
'industry': 'Version Control / DevOps',
'name': 'Gitea',
'type': 'Software'}],
'attack_vector': 'Exploitation of the diffpatch endpoint via crafted Git '
'patches and hooks',
'data_breach': {'data_exfiltration': 'Possible via Git objects and '
'authenticated Smart HTTP',
'personally_identifiable_information': 'Potential (if stored '
'in repositories or '
'configurations)',
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Configuration files (app.ini)',
'Database credentials',
'OAuth tokens',
'Environment variables',
'Repository data']},
'description': 'A severe remote code execution (RCE) vulnerability, tracked '
'as CVE-2026-60004 (CVSS 9.8), has been discovered in Gitea, '
'affecting versions 1.17 through 1.27.0. The flaw allows '
'attackers to execute arbitrary shell commands on vulnerable '
'servers by exploiting the diffpatch endpoint, which processes '
'repository patches using Git commands. The vulnerability '
'stems from how Gitea handles temporary bare repository clones '
'when applying patches, enabling attackers to craft malicious '
'Git hooks for command execution.',
'impact': {'data_compromised': 'Sensitive data (app.ini configurations, '
'database credentials, OAuth tokens, '
'environment variables), mounted repositories, '
'integration credentials',
'identity_theft_risk': 'High (if personally identifiable '
'information is exposed)',
'operational_impact': 'Potential full server takeover, compromise '
'of service account permissions',
'systems_affected': 'Gitea servers (versions 1.17 through 1.27.0)'},
'lessons_learned': 'Importance of prompt patching, access controls, and '
'proactive vulnerability management for self-hosted '
'software like Gitea.',
'post_incident_analysis': {'corrective_actions': 'Patch released in Gitea '
'1.27.1 to address the '
'vulnerability',
'root_causes': 'Improper handling of temporary '
'bare repository clones and Git '
'hooks during patch processing'},
'recommendations': ['Upgrade to Gitea version 1.27.1 immediately',
'Disable or restrict the diffpatch functionality if '
'unable to upgrade',
'Disable public registration and limit repository write '
'permissions',
'Review and enforce least-privilege access for Gitea '
'service accounts',
'Monitor logs for unusual patch submissions or hook '
'activity'],
'references': [{'source': 'Gitea Security Advisory'}],
'response': {'containment_measures': ['Disable or restrict the diffpatch '
'functionality',
'Disable public registration and limit '
'repository write permissions',
'Review Gitea service account '
'privileges and enforce least-privilege '
'access'],
'enhanced_monitoring': 'Monitor Git and Gitea logs for unusual '
'patch submissions or unexpected hook '
'activity',
'remediation_measures': 'Upgrade to Gitea version 1.27.1'},
'title': 'Critical RCE Vulnerability in Gitea (CVE-2026-60004) Exposes '
'Servers to Arbitrary Command Execution',
'type': 'Remote Code Execution (RCE)',
'vulnerability_exploited': 'CVE-2026-60004'}