CVE-2024-1947: Improper Handling of Highly Compressed Data (Data Amplification) 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: 2024-05-23 · updated 2026-06-17
Weakness: CWE-409

Description

A denial of service (DoS) condition was discovered in GitLab CE/EE affecting all versions from 13.2.4 before 16.10.6, 16.11 before 16.11.3, and 17.0 before 17.0.1. By leveraging this vulnerability an attacker could create a DoS condition by sending crafted API calls.

Affected products

GitLab: from 13.2.4 before 16.10.6; from 16.11.0 before 16.11.3; 17.0.0 — fixed in 16.10.6, 16.11.3

How to fix

Upgrade to a fixed version: GitLab 16.10.6, 16.11.3. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/443559
https://hackerone.com/reports/2380264
https://gitlab.com/gitlab-org/gitlab/-/issues/443559
https://hackerone.com/reports/2380264

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