Insecure Direct Object Reference in JetBrains YouTrack Affects Issue Activities API
CVE-2026-103491

6.5MEDIUM

Key Information:

Vendor

Jetbrains
Status
Youtrack
Vendor
CVE Published:
1 October 2026

What is CVE-2026-103491?

An Insecure Direct Object Reference (iDOR) vulnerability in JetBrains YouTrack prior to version 2026.2.19422 permits unauthorized access to restricted issues through the issue activities API, potentially exposing sensitive information. This vulnerability illustrates a critical flaw in access control mechanisms, allowing attackers to gain visibility into issues that should remain confidential.

Affected Version(s)

YouTrack 0 < 2026.2.19422

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.