Authorization bypass through user-controlled key in YouTrack - CVE-2026-86488
Published: September 7, 2026
Vulnerability identifier: #VU147351
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-86488
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose private saved searches.
The vulnerability exists due to improper authorization in the watchRules and issueListConfig endpoints when accessing saved searches. A remote attacker can access private saved searches through these endpoints to disclose private saved searches.
Affected software
YouTrack
How to mitigate CVE-2026-86488
Install security update from vendor's website.
YouTrack - update to 2026.2.18634