CVE-2026-105633 Plane - Broken Access Control

Plane prior to 1.4.0 contains a broken access control caused by improper validation of issue_id in the V2 issue-attachment PATCH endpoint, letting project members modify attachments they do not own, exploit requires project membership.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.30% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-639

Vendor fix

Update to version 1.4.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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