In JetBrains YouTrack before 2026.2.19728 the attachment size limit could be bypassed via AI assistant thread conversion

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00763.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
JetBrains YouTrack unaffected
Version Status Constraints
0 affected < 2026.2.19728

No data.

No data.

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Vendors Products
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Youtrack Subscribe

Project Subscriptions

Vendors Products
Jetbrains Subscribe
Youtrack Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.jetbrains.com/privacy-security/issues-fixed/ cve-icon cve-icon
History

Sat, 07 Nov 2026 07:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Fri, 06 Nov 2026 12:30:00 +0000

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains youtrack
Vendors & Products Jetbrains
Jetbrains youtrack

Fri, 06 Nov 2026 12:00:00 +0000

Type Values Removed Values Added
Title Attachment Size Limit Bypass via AI Assistant Thread Conversion in JetBrains YouTrack

Fri, 06 Nov 2026 10:30:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: JetBrains

Published:

Updated: 2026-11-06T14:45:24.850Z

Reserved: 2026-11-05T18:38:32.900Z

Link: CVE-2026-123336

cve-icon Vulnrichment

Updated: 2026-11-06T14:45:18.744Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-06T11:17:14.117

Modified: 2026-11-06T21:29:48.800

Link: CVE-2026-123336

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-06T12:15:02Z

Weaknesses