CVE-2026-12436

HIGH

Improperly Controlled Modification of Dynamically-Determined Object Attributes in GitLab

Title source: cna

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to modify CI/CD configuration belonging to another user due to improper validation of user-supplied attributes when processing pipeline schedule inputs.

References (3)

Core 3

Core References

https://gitlab.com/gitlab-org/gitlab/-/work_items/603223

Exploit technical-description exploit permissions-required

HackerOne Bug Bounty Report #3800511

https://hackerone.com/reports/3800511

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released/

Scores

CVSS v3 8.4

EPSS 0.0030

EPSS Percentile 22.6%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-915

Status published

Products (3)

GitLab/GitLab 18.0 - 19.0.5

GitLab/GitLab 19.1 - 19.1.3

GitLab/GitLab 19.2 - 19.2.1

Published Jul 29, 2026

Tracked Since Jul 30, 2026