CVE-2026-100259
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Improper Access Control in JetBrains YouTrack Gantt Chart

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: JetBrains s.r.o.

Description
In JetBrains YouTrack before 2026.2.18991 improper access control on Gantt chart allowed edits by users with view-only access

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-100259
EUVD
EUVD-2026-90003

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.18991 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

This vulnerability in JetBrains YouTrack before 2026.2.18991 allows users with view-only access to make edits on Gantt charts due to improper access control.

Impact Analysis

An attacker with view-only access could modify Gantt chart data, potentially altering project timelines or task assignments without proper authorization.

Compliance Impact

This vulnerability could lead to unauthorized data modifications, potentially violating integrity requirements in GDPR or HIPAA if project data is affected.

Mitigation Strategies

Update JetBrains YouTrack to version 2026.2.18991 or later to address the improper access control issue on Gantt charts.

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