Input validation error in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2026-3855
Published: September 11, 2026
Vulnerability identifier: #VU149022
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-3855
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to access restricted file contents on the server.
The vulnerability exists due to improper input validation in the Terraform state API when processing parameters in Terraform state uploads. A remote user can submit improperly validated parameters in a Terraform state upload to access restricted file contents on the server.
Exploitation requires project-level permissions.
Affected software
Gitlab Community Edition
GitLab Enterprise Edition
GitLab Enterprise Edition
How to mitigate CVE-2026-3855
Install security update from vendor's website.
Gitlab Community Edition - addressed in versions 19.1.8, 19.2.6, 19.3.2
GitLab Enterprise Edition - addressed in versions 19.1.8, 19.2.6, 19.3.2
GitLab Enterprise Edition - addressed in versions 19.1.8, 19.2.6, 19.3.2