draw.io is a configurable diagramming and whiteboarding application. Prior to version 29.7.9, the draw.io client accepts a ?gitlab= URL parameter that overrides the GitLab server URL used during OAuth sign-in. A crafted link causes the user's click on draw.io's "Authorize in GitLab" dialog to open a popup on the attacker-controlled host instead of gitlab.com. This can lead to credential fishing and session state token exfiltration. This issue has been patched in version 29.7.9.
History

Fri, 08 May 2026 21:45:00 +0000

Type Values Removed Values Added
Description draw.io is a configurable diagramming and whiteboarding application. Prior to version 29.7.9, the draw.io client accepts a ?gitlab= URL parameter that overrides the GitLab server URL used during OAuth sign-in. A crafted link causes the user's click on draw.io's "Authorize in GitLab" dialog to open a popup on the attacker-controlled host instead of gitlab.com. This can lead to credential fishing and session state token exfiltration. This issue has been patched in version 29.7.9.
Title Unvalidated gitlab URL parameter redirects OAuth authorize step to attacker-controlled host
Weaknesses CWE-200
CWE-601
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-08T21:22:40.678Z

Reserved: 2026-04-25T01:53:21.584Z

Link: CVE-2026-42195

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-08T22:16:31.410

Modified: 2026-05-08T22:16:31.410

Link: CVE-2026-42195

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T22:30:18Z