Mailbox Credential Exfiltration Vulnerability in JetBrains YouTrack
CVE-2026-86497

6.8MEDIUM

Key Information:

Vendor

Jetbrains
Status
Youtrack
Vendor
CVE Published:
7 September 2026

What is CVE-2026-86497?

In JetBrains YouTrack prior to version 2026.2.18769, a security flaw was identified where a project administrator could change the mailbox host without requiring re-authentication. This oversight permitted unauthorized exfiltration of stored mailbox credentials, potentially compromising sensitive information and exposing user data.

Affected Version(s)

YouTrack 0 < 2026.2.18769

References

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

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.