CVE-2026-123336

Attachment Size Limit Bypass via AI Assistant Thread Conversion in JetBrains YouTrack

Published Nov 6, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Description
In JetBrains YouTrack before 2026.2.19728 the attachment size limit could be bypassed via AI assistant thread conversion

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains youtrack
Vendors & Products Jetbrains
Jetbrains youtrack
Type Values Removed Values Added
Title Attachment Size Limit Bypass via AI Assistant Thread Conversion in JetBrains YouTrack
Type Values Removed Values Added
Description In JetBrains YouTrack before 2026.2.19728 the attachment size limit could be bypassed via AI assistant thread conversion
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
JetBrains
Published
Updated
Nov 6, 2026, 2:45 PM
Reserved
Nov 5, 2026, 6:38 PM
Status
Awaiting Analysis
Published
Nov 6, 2026, 11:17 AM
Modified
Nov 6, 2026, 9:29 PM