CVE-2020-26417

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-11 · updated 2026-06-17
Weakness: CWE-200

Description

Information disclosure via GraphQL in GitLab CE/EE 13.1 and later exposes private group and project membership. This affects versions >=13.6 to <13.6.2, >=13.5 to <13.5.5, and >=13.1 to <13.4.7.

Affected products

GitLab: from 13.1.0 before 13.4.7; from 13.5.0 before 13.5.5; from 13.6.0 before 13.6.2 — fixed in 13.4.7, 13.5.5, 13.6.2

How to fix

Upgrade to a fixed version: GitLab 13.4.7, 13.5.5, 13.6.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26417.json
https://gitlab.com/gitlab-org/gitlab/-/issues/282539
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26417.json
https://gitlab.com/gitlab-org/gitlab/-/issues/282539

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