Exposure of Data Element to Wrong Session in YouTrack - CVE-2026-86492
Published: September 7, 2026
Vulnerability identifier: #VU147347
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-86492
CWE-ID: CWE-488
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to exposure of data to the wrong session in the shared token cache when accessing cached GitHub App installation tokens. A remote user can retrieve GitHub App installation tokens associated with other tenants to disclose sensitive information.
Affected software
YouTrack
How to mitigate CVE-2026-86492
Install security update from vendor's website.
YouTrack - update to 2026.2.18634