What is CVE-2026-15342?

CVE-2026-15342 is a medium-severity vulnerability in Plane, classified under Files or Directories Accessible to External Parties. CVSS score: 6.5/10. Published 2026-07-21.

How severe is CVE-2026-15342?

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

Auth bypass in Plane

CVE-2026-15342

Plane contains a multi‑tenant authorization flaw in its asset‑management API that allows authenticated users from one workspace to access, delete, or duplicate assets belonging to another workspace by providing only the victim workspace slug and asset ID. The affected endpoints return presigned file URLs and enable destructive or duplicative actions without verifying that the requester is a member of the targeted workspace. This enables cross‑tenant data exposure, data deletion, and persistent exfiltration of files into an attacker‑controlled workspace.

EPSS: 0.004 (30.7th 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

Plane — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-15342?: CVE-2026-15342 is a medium-severity vulnerability in Plane, classified under Files or Directories Accessible to External Parties. CVSS score: 6.5/10. Published 2026-07-21.
How severe is CVE-2026-15342?: Medium severity. CVSS v3 base score is 6.5 out of 10.