CVE-2026-19650
Received Received - Intake

Unauthenticated GraphQL Mutation Execution in GitLab

Publication date: 2026-08-17

Last updated on: 2026-08-17

Assigner: GitLab Inc.

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-17
Last Modified
2026-08-17
Generated
2026-08-18
AI Q&A
2026-08-17
EPSS Evaluated
N/A
NVD
CVE-2026-19650
EUVD
EUVD-2026-60371

Affected Vendors & Products

Showing 8 associated CPEs
Vendor Product Version / Range
gitlab gitlab_ce From 19.0 (inc) to 19.0.8 (exc)
gitlab gitlab_ce From 19.1 (inc) to 19.1.6 (exc)
gitlab gitlab_ce From 19.2 (inc) to 19.2.4 (exc)
gitlab gitlab_ce From 18.2 (inc) to 18.11.11 (exc)
gitlab gitlab_ee From 18.2 (inc) to 18.11.11 (exc)
gitlab gitlab_ee From 19.0 (inc) to 19.0.8 (exc)
gitlab gitlab_ee From 19.1 (inc) to 19.1.6 (exc)
gitlab gitlab_ee From 19.2 (inc) to 19.2.4 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

GitLab had a security flaw in its CE/EE versions from 18.2 up to but not including 18.11.11, 19.0 before 19.0.8, 19.1 before 19.1.6, and 19.2 before 19.2.4. The issue allowed unauthenticated users to execute GraphQL mutations via GET requests due to improper validation in GraphQL multiplex query handling.

Detection Guidance

This vulnerability involves improper request validation in GraphQL multiplex query handling in GitLab versions before 18.11.11, 19.0.8, 19.1.6, and 19.2.4. To detect it, check GitLab version with commands like 'gitlab-rake gitlab:env:info' or 'cat /opt/gitlab/version-manifest.txt'. If the version is below the patched releases, the system is vulnerable.

Impact Analysis

An attacker could exploit this to perform unauthorized actions on the GitLab instance without logging in. This might include modifying data, triggering unintended operations, or disrupting services, depending on the GraphQL mutations available.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating confidentiality and integrity requirements in GDPR and HIPAA. Organizations using affected GitLab versions may face compliance violations if exploited.

Mitigation Strategies

Upgrade GitLab to a patched version: 18.11.11, 19.0.8, 19.1.6, or 19.2.4 or later. Verify the upgrade was successful and monitor for unusual activity.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-19650. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart