CVE-2026-100277
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
JetBrains YouTrack
CVSS
8.9HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.28%Chance of exploitation activity in the next 30 days, higher than 19% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 2026.2.19197YouTrackCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Affected versions 1
- YouTrackaffected: all versions before 2026.2.19197CVE List