Incorrect authorization in YouTrack - CVE-2026-86487
Published: September 7, 2026
Vulnerability identifier: #VU147352
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-86487
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to modify canvas content.
The vulnerability exists due to improper authorization in whiteboard WebSocket message handling when processing a crafted WebSocket message. A remote user can send a crafted WebSocket message to modify canvas content.
Affected software
YouTrack
How to mitigate CVE-2026-86487
Install security update from vendor's website.
YouTrack - update to 2026.2.18634