CVE-2026-93577 GitLab CVE debrief

Who should care

GitLab administrators, DevOps teams, and security personnel responsible for CI/CD configurations and authenticated user access management should assess exposure and apply remediation.

Why it matters

Defenders should prioritize verifying exposure and applying remediation for GitLab instances running vulnerable versions, focusing on authenticated user access and CI/CD configuration handling. The integer overflow issue can lead to arbitrary code execution, emphasizing the need for prompt patching and access restrictions.

• Potential for authenticated users to execute arbitrary code on the GitLab server.
• Exposure of CI/CD configurations to specially crafted regular expressions.
• Need for verification of instance versions and application of patches.
• Importance of restricting authenticated user access and monitoring for suspicious activity.

Technical summary

The integer overflow issue in GitLab CE/EE can lead to arbitrary code execution on the server when compiling specially crafted regular expressions in CI/CD configurations. Affected versions include 19.2 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1. The issue arises from improper handling of regular expressions in CI/CD configurations, allowing authenticated users to execute arbitrary code. Remediation involves upgrading to patched versions (19.2.7, 19.3.3, or 19.4.1) and reviewing CI/CD configurations for exposure.

Defensive priority

Defenders should prioritize verifying exposure and applying remediation for GitLab instances running vulnerable versions, focusing on authenticated user access and CI/CD configuration handling.

Recommended defensive actions

• Verify GitLab instance versions and compare to vulnerable ranges (19.2 to 19.2.6, 19.3 to 19.3.2, 19.4.0).
• Apply patches or updates to remediate the issue (upgrade to 19.2.7, 19.3.3, or 19.4.1).
• Review CI/CD configurations for potential exposure to specially crafted regular expressions.
• Restrict authenticated user access and monitor for suspicious activity.
• Perform a thorough review of instance configurations and user access controls.
• Implement additional monitoring and logging to detect potential exploitation attempts.
• Coordinate with relevant teams to ensure patching and mitigation efforts are completed.

Evidence notes

The CVE record and NVD entry provide details on the integer overflow issue in GitLab CE/EE, including affected versions and remediation information. Vendor advisories and issue tracking links are available for further context.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.