CVE-2020-26407

Name: CVE-2020-26407
Creator: NVD / NIST
Published: 2020-12-10T06:15:13.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2020-26407 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A XSS vulnerability exists in Gitlab CE/EE from 12.4 before 13.4.7, 13.5 before 13.5.5, and 13.6 before 13.6.2 that allows an attacker to perform cross-site scripting to other users via importing a malicious project. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

A XSS vulnerability exists in Gitlab CE/EE from 12.4 before 13.4.7, 13.5 before 13.5.5, and 13.6 before 13.6.2 that allows an attacker to perform cross-site scripting to other users via importing a malicious project

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.72%

49.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 12.4.0, < 13.4.7
Gitlab	Gitlab	>= 13.5.0, < 13.5.5
Gitlab	Gitlab	>= 13.6.0, < 13.6.2

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26407.jsonThird Party Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/212630Broken Link
https://hackerone.com/reports/832117Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26407.jsonThird Party Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/212630Broken Link
https://hackerone.com/reports/832117Permissions Required, Third Party Advisory

Timeline

Published: Dec 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26407?

How severe is CVE-2020-26407?

CVE-2020-26407 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26407?

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-2020-26407?

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

Scan your code now

Source: NVD / NIST