Unauthorized Access Vulnerability in GitLab Products
CVE-2026-19650

7.1HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
17 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19650?

A vulnerability in GitLab CE/EE versions prior to specific patch releases allows unauthorized users to execute mutations through GET requests due to flawed request validation mechanisms within the GraphQL multiplex query handling process. This could potentially lead to unauthorized data manipulation and compromises system integrity.

Affected Version(s)

GitLab 18.2 < 18.11.11

GitLab 19.0 < 19.0.8

GitLab 19.1 < 19.1.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19650-CVE-2026-19478
Created by HORKimhab

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/612617
https://hackerone.com/reports/3903669
technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gi...

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [kreep](https://hackerone.com/kreep) for reporting this vulnerability through our HackerOne bug bounty program
.