Authorization bypass through user-controlled key in YouTrack - CVE-2026-86481
Published: September 7, 2026
Vulnerability identifier: #VU147330
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-2026-86481
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose restricted project icons.
The vulnerability exists due to authorization bypass through a user-controlled key in signed URL handling for project icons when reusing a signed URL for a restricted project icon. A remote attacker can reuse a signed URL to disclose restricted project icons.
Affected software
YouTrack
How to mitigate CVE-2026-86481
Install security update from vendor's website.
YouTrack - update to 2026.2.18634