Missing Authorization in YouTrack - CVE-2026-123323
Published: November 6, 2026
Vulnerability identifier: #VU159678
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-123323
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to send REST requests without user confirmation.
The vulnerability exists due to improper URL validation in the YouTrack app widget host when handling app-initiated REST requests. A remote user can provide a crafted URL through an app to send REST requests without user confirmation.
Affected software
YouTrack
How to mitigate CVE-2026-123323
Install security update from vendor's website.
YouTrack - addressed in versions 2025.3.170763, 2026.1.14150, 2026.2.19656