CVE-2026-103493 JetBrains YouTrack - Stored XSS

JetBrains YouTrack < 2026.2.19422 contains a stored XSS caused by improper sanitization of Mermaid and LaTeX content, letting attackers execute scripts in users' browsers, exploit requires content submission.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.22% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 2026.2.19422 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs