Server-Side Request Forgery (SSRF) in YouTrack - CVE-2026-100257
Published: October 2, 2026
Vulnerability identifier: #VU153138
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100257
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform server-side request forgery.
The vulnerability exists due to stored XHTML injection in PDF export when exporting stored XHTML content. A remote attacker can inject crafted XHTML content and export it as a PDF to perform server-side request forgery.
Affected software
YouTrack
How to mitigate CVE-2026-100257
Install security update from vendor's website.
YouTrack - update to 2026.2.18991