CVE-2025-14592: GitLab GraphQL Auth Bypass Vulnerability

CVE-2025-14592 Overview

A missing authorization vulnerability (CWE-862) has been identified in GitLab CE/EE that could allow an authenticated user to perform unauthorized operations by submitting GraphQL mutations through the GLQL API endpoint. This authorization bypass affects GitLab's GraphQL interface, potentially enabling users to execute mutations beyond their intended permission scope under certain conditions.

Critical Impact

Authenticated users may perform unauthorized GraphQL mutations through the GLQL API endpoint, bypassing intended access controls.

Affected Products

• GitLab CE/EE versions 18.6 before 18.6.6
• GitLab CE/EE versions 18.7 before 18.7.4
• GitLab CE/EE versions 18.8 before 18.8.4

Discovery Timeline

• 2026-02-10 - GitLab releases security patch in version 18.8.4
• 2026-02-11 - CVE CVE-2025-14592 published to NVD
• 2026-02-11 - Last updated in NVD database

Technical Details for CVE-2025-14592

Vulnerability Analysis

This vulnerability stems from a missing authorization check (CWE-862) in GitLab's GLQL API endpoint that processes GraphQL mutations. The flaw allows authenticated users to submit GraphQL operations that should be restricted based on their permission level. Under specific conditions, the authorization validation logic fails to properly verify whether the requesting user has sufficient privileges to execute certain mutations.

GraphQL APIs expose a flexible query interface that allows clients to request exactly the data they need. However, this flexibility also means that proper authorization checks must be implemented for each resolver and mutation. In this case, the GLQL API endpoint did not consistently enforce authorization boundaries, creating a pathway for privilege escalation within the GraphQL context.

The vulnerability requires network access and has high attack complexity, indicating that exploitation depends on specific conditions being met. The impact is limited to integrity concerns without affecting confidentiality or availability.

Root Cause

The root cause is a missing authorization vulnerability (CWE-862) in the GLQL API endpoint's mutation handling logic. The authorization framework failed to properly validate user permissions before processing certain GraphQL mutations, allowing authenticated users to bypass intended access restrictions. This type of vulnerability typically occurs when authorization checks are inconsistently applied across API endpoints or when new endpoints are added without inheriting the security controls of similar existing functionality.

Attack Vector

The attack is network-based and requires an authenticated session. An attacker would need valid credentials to access the GitLab instance and then craft specific GraphQL mutations targeting the GLQL API endpoint. The high complexity rating suggests that successful exploitation requires specific conditions to be present, potentially including particular mutation types, object states, or configuration settings.

The vulnerability manifests in the GLQL API endpoint's handling of GraphQL mutations. When processing certain mutation requests, the authorization layer fails to properly validate the user's permissions against the requested operation. For technical implementation details, refer to the GitLab Issue Discussion and the HackerOne Report #3451435.

Detection Methods for CVE-2025-14592

Indicators of Compromise

• Unusual GraphQL mutation patterns from user accounts with limited permissions
• Audit log entries showing unexpected GLQL API endpoint activity
• GraphQL queries attempting to access or modify resources outside user permission scope
• Elevated mutation success rates from accounts that should have restricted access

Detection Strategies

• Monitor GitLab audit logs for unauthorized mutation attempts through the GLQL API endpoint
• Implement alerting on GraphQL operations from users accessing resources outside their normal scope
• Review access patterns for anomalies in GraphQL mutation success/failure ratios
• Enable verbose logging for GraphQL API endpoints to capture detailed request information

Monitoring Recommendations

• Configure GitLab audit events to capture all GraphQL API activity
• Establish baseline metrics for normal GLQL API usage patterns per user role
• Implement real-time alerting for authorization failures and unexpected mutations
• Regularly review GraphQL endpoint access logs for suspicious activity patterns

How to Mitigate CVE-2025-14592

Immediate Actions Required

• Upgrade GitLab CE/EE to patched versions: 18.6.6, 18.7.4, or 18.8.4 immediately
• Review audit logs for any suspicious GLQL API activity prior to patching
• Assess whether any unauthorized operations were performed through the GraphQL endpoint
• Temporarily restrict access to GraphQL endpoints if immediate patching is not possible

Patch Information

GitLab has released security patches addressing this vulnerability. Users should upgrade to the following versions:

• GitLab 18.6.6 for the 18.6.x branch
• GitLab 18.7.4 for the 18.7.x branch
• GitLab 18.8.4 for the 18.8.x branch

For complete patch details, see the GitLab Release Patch Notes.

Workarounds

• Restrict network access to GitLab instances to trusted IP ranges where possible
• Implement additional network-layer authentication for GraphQL API endpoints
• Review and minimize GraphQL mutation permissions for non-administrative users
• Enable enhanced audit logging to detect potential exploitation attempts

# Configuration example
# Verify current GitLab version
gitlab-rake gitlab:env:info | grep -i version

# Upgrade GitLab to patched version (example for Omnibus installation)
sudo apt-get update
sudo apt-get install gitlab-ce=18.8.4-ce.0

# Or for GitLab EE
sudo apt-get install gitlab-ee=18.8.4-ee.0

# Reconfigure GitLab after upgrade
sudo gitlab-ctl reconfigure

# Verify the upgrade
gitlab-rake gitlab:env:info