CVE-2026-105630 Plane: Stored XSS via SVG attachment served inline on the application origin (account takeover)
An attacker can upload malicious SVG files that execute JavaScript in the victim's browser, leading to session hijacking and account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-105630?
CVE-2026-105630 is a high-severity cross-site scripting vulnerability in makeplane plane, published on 5 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Which versions are affected by CVE-2026-105630?
How do I fix CVE-2026-105630?
No fix has been published for CVE-2026-105630 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-105630 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-105630 exists.
Sources
Also known as GHSA-ch8j-vr4r-qf6h.