Detections
Analytics

JetBrains YouTrack < 2026.2.17012 CSS Injection (CVE-2026-59791)

low Nessus Plugin ID 327414

Language:

Synopsis

The remote host is affected by a CSS injection vulnerability.

Description

The version of JetBrains YouTrack installed on the remote host is prior to 2026.2.17012. It is, therefore, affected by a CSS injection vulnerability:

 - CSS injection via Mermaid diagram rendering was possible. (CVE-2026-59791)

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 2026.2.17012, or later.

See Also

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

Plugin Details

Severity: Low

ID: 327414

File Name: jetbrains_youtrack_CVE-2026-59791.nasl

Version: 1.2

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 7/16/2026

Updated: 7/17/2026

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: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2026-59791

CVSS v3

Risk Factor: Low

Base Score: 3.5

Temporal Score: 3.1

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:jetbrains:youtrack

Required KB Items: installed_sw/JetBrains YouTrack

Exploit Ease: No known exploits are available

Patch Publication Date: 7/10/2026

Vulnerability Publication Date: 7/10/2026

Reference Information

CVE: CVE-2026-59791