IDOR Vulnerability in JetBrains YouTrack Affects User Notifications
CVE-2026-103496

5.4MEDIUM

Key Information:

Vendor

Jetbrains
Status
Youtrack
Vendor
CVE Published:
1 October 2026

What is CVE-2026-103496?

An Insecure Direct Object Reference (IDOR) vulnerability was identified in JetBrains YouTrack prior to version 2026.2.19422. This flaw allows attackers to exploit compromised inbox threads and gain unauthorized access to notifications intended for other users. Such a vulnerability poses significant risks to user privacy and data integrity, making timely updates crucial for all affected users.

Affected Version(s)

YouTrack 0 < 2026.2.19422

References

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

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.