Quick answers
- Is CVE-2026-105633 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105633 being exploited in the wild.
- How severe is CVE-2026-105633?
- High severity, with a CVSS score of 7.1, published 5 October 2026.
- Which products and versions are affected?
- Plane before 1.4.0.
- Is there a fix for CVE-2026-105633?
- Yes: fixed in 1.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-105633 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-105633?
- Check whether you run 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
Technical details
The V2 issue-attachment PATCH endpoint fails to validate the issue_id parameter when looking up FileAsset objects in the database, only checking pk, workspace, and project_id. An authenticated project member can supply a controlled issue_id in the URL while targeting another user's attachment UUID, and the PATCH handler will unconditionally set created_by = request.user, transferring ownership. This requires being an authenticated project member but no further privileges.
Affected products
- Plane Plane before 1.4.0
Timeline
- 2026-10-05: disclosed
- 2026-07-01: patched