Resource exhaustion in GitLab

CVE-2025-10858

An issue was discovered in GitLab CE/EE affecting all versions before 18.2.7, 18.3 before 18.3.3, and 18.4 before 18.4.1 that allows unauthenticated users to cause a Denial of Service (DoS) condition while uploading specifically crafted large JSON files.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-10858: held from 0.006 to 0.006.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

  • GitLab — versions 18.4.0, 18.3, 18.4

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-10858?
CVE-2025-10858 is a high-severity vulnerability in GitLab, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-09-26.
How severe is CVE-2025-10858?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-10858 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.