What is CVE-2018-18843?

CVE-2018-18843 is a critical-severity vulnerability in GitLab, classified under Server-Side Request Forgery (SSRF). CVSS score: 10.0/10. Published 2018-12-04.

How severe is CVE-2018-18843?

Critical severity. CVSS v3 base score is 10.0 out of 10.

SSRF in GitLab

CVE-2018-18843

The Kubernetes integration in GitLab Enterprise Edition 11.x before 11.2.8, 11.3.x before 11.3.9, and 11.4.x before 11.4.4 has SSRF.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2018-12-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

GitLab

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

gitlab.com/gitlab-org/gitlab-ce/issues/53158 (Exploit, Patch, Issue Tracking, Vendor Advisory)
about.gitlab.com/2018/11/01/critical-security-release-gitlab-11-dot-4-dot-4-rel… (Vendor Advisory)

Frequently asked questions

What is CVE-2018-18843?: CVE-2018-18843 is a critical-severity vulnerability in GitLab, classified under Server-Side Request Forgery (SSRF). CVSS score: 10.0/10. Published 2018-12-04.
How severe is CVE-2018-18843?: Critical severity. CVSS v3 base score is 10.0 out of 10.