CVE-2026-100263
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.7epss 0.2%
exploitation probability
0.2%top 92% of all CVEs
observed exploitation
nono source reports it
In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
Affected products
JetBrains · YouTrack