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.

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 b…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.003 (20.2th percentile) — read the EPSS interpretation.

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.

Affected products

Makeplane Plane — versions < 1.3.1
Plane

Weakness classification (CWE)

Public proof-of-concept exploits

0xmrma/CVE-2026-46558

References

security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_CONFIRM, 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.