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CVE-2026-42195

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

Published: May 8, 2026Updated: May 12, 2026 Sources: CVE List NVDCWE-200
3.4LOW
NVD MITRE
EPSS Score
0.2%
Top 91.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:CC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-200CWE-601

Affected Products

jgraph
commercialaka jgraph/drawio, drawio, mxgraph
drawioMixed
Web & CMS Plugins / site-builder

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Initial Access
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References

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

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