CVE-2026-103491
Received Received - Intake

Insecure Direct Object Reference in JetBrains YouTrack

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: JetBrains s.r.o.

Description
In JetBrains YouTrack before 2026.2.19422 iDOR in the issue activities API allowed reading restricted issues

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Meta Information

Published
2026-10-01
Last Modified
2026-10-01
Generated
2026-10-01
AI Q&A
2026-10-01
EPSS Evaluated
N/A
NVD
CVE-2026-103491
EUVD
EUVD-2026-90582

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.19422 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

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Executive Summary

This vulnerability is an Insecure Direct Object Reference (iDOR) in JetBrains YouTrack before version 2026.2.19422. It allows unauthorized users to read restricted issues through the issue activities API.

Detection Guidance

To detect this vulnerability, check if your YouTrack instance is running a version before 2026.2.19422. Use API calls to the issue activities endpoint and verify if restricted issues can be accessed without proper permissions. Monitor logs for unauthorized access attempts to issue data.

Impact Analysis

An attacker with access to the API could read sensitive issue details that should be restricted, potentially exposing confidential information or internal discussions.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access controls.

Mitigation Strategies

Update JetBrains YouTrack to version 2026.2.19422 or later to address the iDOR vulnerability in the issue activities API.

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