What is CVE-2025-9958?

CVE-2025-9958 is a high-severity vulnerability in Gitlab, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 7.7/10. Published 2025-09-26.

How severe is CVE-2025-9958?

High severity. CVSS v3 base score is 7.7 out of 10.

Is CVE-2025-9958 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Gitlab

CVE-2025-9958

An issue has been discovered in GitLab CE/EE affecting all versions from 14.10 before 18.2.7, 18.3 before 18.3.3, and 18.4 before 18.4.1, that could have allowed Guest users to access sensitive information stored in virtual registry configurations.

EPSS: 0.005 (37.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Gitlab — versions 18.4.0, 18.3, 18.4

Weakness classification (CWE)

CWE-201 — Insertion of Sensitive Information into Sent Data

Public proof-of-concept exploits

References

cve@gitlab.com (issue-tracking, permissions-required, Broken Link)
cve@gitlab.com (Permissions Required, technical-description, permissions-required, exploit)

Frequently asked questions

What is CVE-2025-9958?: CVE-2025-9958 is a high-severity vulnerability in Gitlab, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 7.7/10. Published 2025-09-26.
How severe is CVE-2025-9958?: High severity. CVSS v3 base score is 7.7 out of 10.
Is CVE-2025-9958 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.