CVE-2026-42195 — Unvalidated gitlab URL parameter redirects OAuth authorize step to attacker-controlled host
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 serve…
Published: 2026-05-08 · CVSS: 3.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7