CVE-2026-3254

LOW

3.5

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.

CVE Details

CVSS v3.1 Score3.5

SeverityLOW

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published4/22/2026

Last Modified4/22/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-1021

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/591587(cve@gitlab.com)

https://hackerone.com/reports/3572752(cve@gitlab.com)

IOC Correlations

No correlations recorded

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