What’s Vulnerable › Vulnerabilities

CVE-2025-2934: Allocation of Resources Without Limits or Throttling in GitLab

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-09 · updated 2026-10-19
• Weakness: CWE-770

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 5.2 prior to 18.2.8, 18.3 prior to 18.3.4, and 18.4 prior to 18.4.2 that could have allowed an authenticated attacker to create a denial of service condition by configuring malicious webhook endpoints that send crafted HTTP responses.

Affected products

• GitLab: from 5.2.0 before 18.2.8; from 18.3.0 before 18.3.4; from 18.4.0 before 18.4.2 — fixed in 18.2.8, 18.3.4, 18.4.2

How to fix

Upgrade to a fixed version: GitLab 18.2.8, 18.3.4, 18.4.2. Check the vendor advisory for mitigations.

References

• https://about.gitlab.com/releases/2025/10/08/patch-release-gitlab-18-4-2-released/
• https://gitlab.com/gitlab-org/gitlab/-/issues/528979
• https://hackerone.com/reports/3058791

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