CVE-2026-100259: CWE-863 in JetBrains YouTrack
CVE-2026-100259 is an improper access control vulnerability in JetBrains YouTrack versions before 2026.2.18991. It allows users with view-only access to edit the Gantt chart, which should not be permitted. The vulnerability has a medium severity with a CVSS score of 4.3.
AI Analysis
Technical Summary
This vulnerability (CWE-863) in JetBrains YouTrack affects versions prior to 2026.2.18991. It involves improper access control on the Gantt chart feature, enabling users who only have view permissions to perform edits. This flaw violates the intended access restrictions and could lead to unauthorized modifications within the application.
Potential Impact
The impact is limited to unauthorized modification of the Gantt chart by users who should only have view access. There is no confidentiality or availability impact reported. The integrity of project scheduling data can be compromised, potentially affecting project management accuracy.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18991. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-100259: CWE-863 in JetBrains YouTrack
Description
CVE-2026-100259 is an improper access control vulnerability in JetBrains YouTrack versions before 2026.2.18991. It allows users with view-only access to edit the Gantt chart, which should not be permitted. The vulnerability has a medium severity with a CVSS score of 4.3.
CVSS v3.1
Score 4.3medium
Affected software
JetBrains
YouTrack
pkg:github/jetbrains/YouTrackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-863) in JetBrains YouTrack affects versions prior to 2026.2.18991. It involves improper access control on the Gantt chart feature, enabling users who only have view permissions to perform edits. This flaw violates the intended access restrictions and could lead to unauthorized modifications within the application.
Potential Impact
The impact is limited to unauthorized modification of the Gantt chart by users who should only have view access. There is no confidentiality or availability impact reported. The integrity of project scheduling data can be compromised, potentially affecting project management accuracy.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18991. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-25T17:02:04.410Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd2c302a4e24523d2ec2f5
Added to database: 09/30/2026, 15:35:12 UTC
Last enriched: 09/30/2026, 16:17:58 UTC
Last updated: 10/01/2026, 03:42:23 UTC
Views: 12
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