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

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Summary

CVECVE-2026-42195
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 22:16:31 UTC
Updated2026-05-08 22:16:31 UTC
Descriptiondraw.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.

Risk And Classification

Primary CVSS: v3.1 3.4 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

Problem Types: CWE-200 | CWE-601 | CWE-601 CWE-601: URL Redirection to Untrusted Site ('Open Redirect') | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.4LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
3.1CNADECLARED3.4LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Jgraph Drawio affected < 29.7.9 Not specified

References

ReferenceSourceLinkTags
github.com/jgraph/drawio/releases/tag/v29.7.9 [email protected] github.com
github.com/jgraph/drawio/security/advisories/GHSA-8x7j-m8px-7p8x [email protected] github.com
github.com/jgraph/drawio/issues/493 [email protected] github.com
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