CVE-2026-100277
CVSS v3
8.9
HIGH
EPSS Score
0.3 %
exploit probability, as of 2026-10-01
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
- Published
- 2026-09-30
- Last Modified
- 2026-10-01
Frequently asked questions
What is CVE-2026-100277?
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
Is CVE-2026-100277 actively exploited?
Active exploitation of CVE-2026-100277 has not been confirmed. Its EPSS score was 0.3% on 2026-10-01, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-100277?
CVE-2026-100277 has a CVSS v3 base score of 8.9 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L.
Is CVE-2026-100277 affecting your environment?
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