jgraph drawio up to 29.7.8 Link gitlab redirect

Summaryinfo

A vulnerability, which was classified as problematic, was found in jgraph drawio up to 29.7.8. Impacted is an unknown function of the component Link Handler. Such manipulation of the argument gitlab leads to redirect. This vulnerability is listed as CVE-2026-42195. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in jgraph drawio up to 29.7.8. Affected by this issue is some unknown functionality of the component Link Handler. The manipulation of the argument gitlab with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-42195 since 04/25/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

Upgrading to version 29.7.9 eliminates this vulnerability. The upgrade is hosted for download at github.com.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• jgraph

Name

• drawio

Version

• 29.7.0
• 29.7.1
• 29.7.2
• 29.7.3
• 29.7.4
• 29.7.5
• 29.7.6
• 29.7.7
• 29.7.8

License

• open-source

Website

• Product: https://github.com/jgraph/drawio/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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