Detections
Analytics

JetBrains YouTrack < 2026.2.19728 Attachment Size Limit Bypass (CVE-2026-123336)

low Nessus Plugin ID 379541

Synopsis

The remote host is affected by an attachment size limit bypass vulnerability.

Description

The version of JetBrains YouTrack installed on the remote host is prior to 2026.2.19728. It is, therefore, affected by an attachment size limit bypass vulnerability:

 - In JetBrains YouTrack before 2026.2.19728 the attachment size limit could be bypassed via AI assistant thread conversion. (CVE-2026-123336)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to JetBrains YouTrack version 2026.2.19728, or later.

See Also

https://www.jetbrains.com/privacy-security/issues-fixed/

Plugin Details

Severity: Low

ID: 379541

File Name: jetbrains_youtrack_2026_2_19728.nasl

Version: 1.1

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 11/12/2026

Updated: 11/12/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 2.1

Vector: CVSS2#AV:N/AC:H/Au:S/C:N/I:N/A:P

CVSS Score Source: CVE-2026-123336

CVSS v3

Risk Factor: Low

Base Score: 3.1

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Vulnerability Information

CPE: cpe:/a:jetbrains:youtrack

Required KB Items: installed_sw/JetBrains YouTrack

Patch Publication Date: 10/28/2026

Vulnerability Publication Date: 11/6/2026

Reference Information

CVE: CVE-2026-123336