High severity8.7NVD Advisory· Published Nov 5, 2021· Updated Jun 17, 2026
CVE-2021-39906
CVE-2021-39906
Description
Improper validation of ipynb files in GitLab CE/EE version 13.5 and above allows an attacker to execute arbitrary JavaScript code on the victim's behalf.
Affected products
5cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*+ 2 more
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*range: >=13.5.0,<14.2.6
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*range: >=13.5.0,<14.2.6
- (no CPE)range: >=13.5, <14.2.6
- Range: >=13.5
Patches
Vulnerability mechanics
References
3- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39906.jsonnvdVendor Advisory
- hackerone.com/reports/1347600nvdPermissions RequiredThird Party Advisory
- gitlab.com/gitlab-org/gitlab/-/issues/341566nvdBroken Link
News mentions
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