Quick answers
- Is CVE-2026-39374 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-39374 being exploited in the wild.
- How severe is CVE-2026-39374?
- Medium severity, with a CVSS score of 6.5, published 7 April 2026.
- Which products and versions are affected?
- Makeplane Plane < 1.3.0.
- Is there a fix for CVE-2026-39374?
- A patch was published on 2026-04-07: Fixed in version 1.3.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-39374 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-39374?
- 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.
Technical details
An Insecure Direct Object Reference (IDOR) vulnerability exists in the IssueBulkUpdateDateEndpoint of Plane prior to version 1.3.0. The endpoint, located in apps/api/plane/app/views/issue/base.py, uses Issue.objects.filter(id__in=issue_ids) to fetch issues for bulk updates without verifying that the issues belong to the requester's workspace or project. An attacker with ADMIN or MEMBER privileges in any project can submit a POST request to their own project's bulk update endpoint containing the UUIDs of issues from other projects. This allows the attacker to modify the start_date and target_date of any issue in the instance. The vulnerability is addressed in version 1.3.0 by implementing proper workspace and project filtering.
Affected products
- Makeplane Plane < 1.3.0
Timeline
- 2026-04-07: disclosed
- 2026-04-07: advisory
- 2026-04-07: patched: Fixed in version 1.3.0