CVE-2026-3254

LOW EPSS 4.8%

Published Apr 22, 20262mo ago · Modified Jun 17, 20262w ago

3.5 CVSS 3.1

Low

Published Apr 22, 2026 2mo ago

Last Modified Jun 17, 2026 2w ago

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to load unauthorized content into another user's browser due to improper input validation in the Mermaid sandbox.

CVSS Details

Base Score

3.5

Exploitability

2.1

Impact

1.4

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction Required

Scope Unchanged

Confidentiality None

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

4.8% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-1021

Affected Products 2

Vendor	Product	Version	Range
gitlab	gitlab	18.11.0	any
gitlab	gitlab	18.11.0	any

References 2

gitlab.com https://gitlab.com/gitlab-org/gitlab/-/work_items/591587

Broken Link
hackerone.com https://hackerone.com/reports/3572752

Permissions Required

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.