Account Takeover Vulnerability in JetBrains YouTrack
CVE-2026-100277

8.9HIGH

Key Information:

Vendor

Jetbrains
Status
Youtrack
Vendor
CVE Published:
30 September 2026

What is CVE-2026-100277?

A security vulnerability in JetBrains YouTrack versions prior to 2026.2.19197 allows for account takeover. This arises from a flaw in how notification signatures are handled, potentially enabling attackers to replay a valid notification signature, thereby compromising user accounts. Users are urged to update to the latest version to mitigate this risk.

Affected Version(s)

YouTrack 0 < 2026.2.19197

References

https://www.jetbrains.com/privacy-security/issues-fixed/

CVSS V3.1

Score:
8.9
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.