Auth bypass in Makeplane Plane
CVE-2026-46558
Plane is an open-source project management tool. Prior to version 1.3.1, there is a cross-workspace asset authorization bypass lets any authenticated user read, copy, delete, and overwrite assets in other Plane workspaces. This issue has been patched in version 1.3.1.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.004 (32.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Makeplane Plane — versions < 1.3.1
- Plane
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/makeplane/plane/releases/tag/v1.3.1 (Product, Release Notes)
- github.com/makeplane/plane/security/advisories/GHSA-qw87-v5w3-6vxx (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-46558?
- CVE-2026-46558 is a high-severity vulnerability in Makeplane Plane, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.3/10. Published 2026-06-10.
- How severe is CVE-2026-46558?
- High severity. CVSS v3 base score is 8.3 out of 10.
- Is CVE-2026-46558 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.