What is CVE-2026-39374?

CVE-2026-39374 is a medium-severity vulnerability in Makeplane Plane, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-04-07.

How severe is CVE-2026-39374?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Makeplane Plane

CVE-2026-39374

Plane is an an open-source project management tool. Prior to 1.3.0, the IssueBulkUpdateDateEndpoint allows a project member (ADMIN or MEMBER) to modify the start_date and target_date of ANY issue across the entire Plane instance, regardles…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.002 (11.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Makeplane Plane — versions < 1.3.0
Plane

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-39374?: CVE-2026-39374 is a medium-severity vulnerability in Makeplane Plane, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-04-07.
How severe is CVE-2026-39374?: Medium severity. CVSS v3 base score is 6.5 out of 10.