CVE-2020-26406

Name: CVE-2020-26406
Creator: NVD / NIST
Published: 2020-11-17T01:15:13.717+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.42%

Last modified Jun 17, 2026

CVE-2020-26406 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Certain SAST CiConfiguration information could be viewed by unauthorized users in GitLab EE starting with 13.3. This information was exposed through GraphQL to non-members of public projects with repository visibility restricted as well as guest members on private projects. EPSS estimates a 1.42% chance of exploitation in the next 30 days.

Description

Certain SAST CiConfiguration information could be viewed by unauthorized users in GitLab EE starting with 13.3. This information was exposed through GraphQL to non-members of public projects with repository visibility restricted as well as guest members on private projects. Affected versions are: >=13.3, <13.3.9,>=13.4, <13.4.5,>=13.5, <13.5.2.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

1.42%

69.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 13.3.0, < 13.3.9
Gitlab	Gitlab	>= 13.4.0, < 13.4.5
Gitlab	Gitlab	>= 13.5.0, < 13.5.2

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26406.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/244921Broken Link
https://hackerone.com/reports/965602Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26406.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/244921Broken Link
https://hackerone.com/reports/965602Permissions Required, Third Party Advisory

Timeline

Published: Nov 17, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26406?

How severe is CVE-2020-26406?

CVE-2020-26406 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.42% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26406?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26406?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST