CVE-2026-100277
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a...
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
- Record
CVE-2026-100277- CVSS 3.1
- 8.9 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L - Weakness
- CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2026-90021
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
- Record
EUVD-2026-90021- CVSS 3.1
- 8.9 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mqhr-7f7q-h475
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a...
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
- Record
GHSA-mqhr-7f7q-h475- CVSS 3.1
- 8.9 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L - Weakness
- CWE-863
- Updated
- 2026-11-02
NVD
In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature
- Record
CVE-2026-100277- CVSS 3.1
- 8.9 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-100277 is a high vulnerability (CVSS 8.9) in Jetbrains Youtrack, published September 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. No source names a fixed version.