Vulnerability · Published May 8, 2026 · Assigned by GitHub_M

CVE-2026-42195Unvalidated gitlab URL parameter redirects OAuth authorize step to attacker-controlled host

Low 3.4

In plain English

A low-severity open redirect in drawio from jgraph. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)3.4Low

Exploit odds (30 days)0.2%top 91.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
jgraph	drawio	< 29.7.9

Weakness: CWE-601, CWE-200 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

References

https://github.com/jgraph/drawio/security/advisories/GHSA-8x7j-m8px-7p8x x_refsource_CONFIRM
https://github.com/jgraph/drawio/issues/493 x_refsource_MISC
https://github.com/jgraph/drawio/releases/tag/v29.7.9 x_refsource_MISC