CVE-2021-39886

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-10-05 · updated 2026-06-17
Weakness: CWE-276

Description

Permissions rules were not applied while issues were moved between projects of the same group in GitLab versions starting with 10.6 and up to 14.1.7 allowing users to read confidential Epic references.

Affected products

GitLab: from 10.6.0 before 14.1.7; from 14.2.0 before 14.2.5; from 14.3.0 before 14.3.1 — fixed in 14.1.7, 14.2.5, 14.3.1

How to fix

Upgrade to a fixed version: GitLab 14.1.7, 14.2.5, 14.3.1. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39886.json
https://gitlab.com/gitlab-org/gitlab/-/issues/330520
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39886.json
https://gitlab.com/gitlab-org/gitlab/-/issues/330520

Get alerted when CVE-2021-39886 or the next vulnerability affects your stack