Low severity · published May 8, 2026
CVE-2026-42195
Unvalidated gitlab URL parameter redirects OAuth authorize step to attacker-controlled host
3.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DR
drawio · jgraph
< 29.7.9 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42195
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42195
github.com
https://github.com/jgraph/drawio/issues/493
github.com
https://github.com/jgraph/drawio/releases/tag/v29.7.9
github.com
https://github.com/jgraph/drawio/security/advisories/GHSA-8x7j-m8px-7p8x
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