What is CVE-2021-39900?

CVE-2021-39900 is a low-severity vulnerability in GitLab, classified under Insertion of Sensitive Information into Log File. CVSS score: 2.0/10. Published 2021-10-04.

How severe is CVE-2021-39900?

Low severity. CVSS v3 base score is 2.0 out of 10.

Information disclosure in GitLab

CVE-2021-39900

Information disclosure from SendEntry in GitLab starting with 10.8 allowed exposure of full URL of artifacts stored in object-storage with a temporary availability via Rails logs.

Published 2021-10-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.0 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

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

Affected products

GitLab — versions >=14.3, <14.3.1, >=14.2, <14.2.5, 14.3.0

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

gitlab.com/gitlab-org/gitlab/-/issues/325088 (Broken Link)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39900.json (Third Party Advisory)

Frequently asked questions

What is CVE-2021-39900?: CVE-2021-39900 is a low-severity vulnerability in GitLab, classified under Insertion of Sensitive Information into Log File. CVSS score: 2.0/10. Published 2021-10-04.
How severe is CVE-2021-39900?: Low severity. CVSS v3 base score is 2.0 out of 10.