CVE-2026-19650

high

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.11.11, 19.0 before 19.0.8, 19.1 before 19.1.6, and 19.2 before 19.2.4 that under certain conditions could have allowed an unauthenticated user to execute mutations via GET requests due to improper request validation in GraphQL multiplex query handling.

References

https://hackerone.com/reports/3903669

https://thehackernews.com/2026/08/critical-gitlab-graphql-flaw-could-let.html

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-4-released/

https://gitlab.com/gitlab-org/gitlab/-/work_items/612617

Details

Source: Mitre, NVD

Published: 2026-08-17

Updated: 2026-08-17

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:P

Severity: High

CVSS v3

Base Score: 7.1

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

Severity: High