CVE-2026-105630

Plane is an open-source project management tool. Prior to 1.4.0, an authenticated low-privilege workspace member, including a Guest, can upload an image/svg+xml file as a generic or issue attachment. The file retains the attacker-controlled Content-Type, and the asset-download endpoint creates a presigned URL with Content-Disposition: inline. In the default self-hosted MinIO deployment, the asset URL is served from the same origin as the Plane application, allowing embedded SVG JavaScript to execute in the application's security context. A victim, including a workspace administrator, who opens the link can have the session compromised through stored XSS, leading to account takeover. This issue is fixed in 1.4.0.

• CWE-79
• CWE-434
• CWE-616

• https://github.com/makeplane/plane/commit/9dff20e04808286acb372119d88c666b802b1d50
• https://github.com/makeplane/plane/pull/9312
• https://github.com/makeplane/plane/releases/tag/v1.4.0
• https://github.com/makeplane/plane/security/advisories/GHSA-ch8j-vr4r-qf6h
• https://github.com/makeplane/plane/security/advisories/GHSA-ch8j-vr4r-qf6h

Published

Oct 5, 2026

Last Modified

Oct 5, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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