Is CVE-2026-105630 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-105630 being exploited in the wild.

How severe is CVE-2026-105630?

High severity, with a CVSS score of 8.7, published 5 October 2026.

Which products and versions are affected?

Makeplane Plane prior to 1.4.0.

How is CVE-2026-105630 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-105630?

Check whether you run Makeplane Plane at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-105630: Plane stored XSS via SVG attachment inline serving

CVE-2026-105630 · Severity: high · CVSS 8.7 · Published 2026-10-05

Plane is an open-source project management tool that allows teams to collaborate on projects and tasks. An authenticated user with low privileges, including guest accounts, can upload a malicious SVG file as an attachment. When a workspace administrator or other user opens a link to the file, malicious JavaScript embedded in the SVG executes in the context of the Plane application, potentially compromising the victim's session and leading to account takeover through stored cross-site scripting (XSS).

Technologies: Makeplane Plane. Vendors: Makeplane.

Quick answers

Is CVE-2026-105630 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-105630 being exploited in the wild.
How severe is CVE-2026-105630?: High severity, with a CVSS score of 8.7, published 5 October 2026.
Which products and versions are affected?: Makeplane Plane prior to 1.4.0.
Is there a fix for CVE-2026-105630?: Yes: fixed in 1.4.0. Until then: Upgrade to version 1.4.0 or later. As an interim measure, restrict file upload permissions to trusted workspace members and implement network-level controls to prevent untrusted users from accessing shared attachment links. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-105630 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-105630?: Check whether you run Makeplane Plane at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 1.4.0

Upgrade to version 1.4.0 or later. As an interim measure, restrict file upload permissions to trusted workspace members and implement network-level controls to prevent untrusted users from accessing shared attachment links.

Technical details

The vulnerability is a stored XSS flaw in the asset-download endpoint that serves user-uploaded SVG files with attacker-controlled Content-Type and Content-Disposition: inline headers. Low-privilege authenticated users can upload SVG files with embedded JavaScript; when served from the same origin as the Plane application (particularly in default MinIO deployments), the JavaScript executes in the application's security context. The fix enforces Content-Disposition: attachment for script-capable MIME types (image/svg+xml, text/javascript, application/javascript, text/html, application/xhtml+xml, text/xml, application/xml) across three asset endpoints.

Affected products

makeplane Plane prior to 1.4.0

Timeline

2026-10-05: disclosed
2026-07-13: patched

References

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