Detections
Analytics

JetBrains TeamCity < 2025.11.6 / 2026.1.x < 2026.1.2 Code Execution (CVE-2026-65906)

critical Nessus Plugin ID 344573

Synopsis

The instance of JetBrains TeamCity installed on the remote host is affected by a vulnerability.

Description

The version of JetBrains TeamCity installed on the remote host is prior to 2025.11.6, or version 2026.1 up to but not including 2026.1.2. It is, therefore, affected by a vulnerability:

 - In JetBrains TeamCity before 2026.1.2, 2025.11.6 code execution via Kotlin DSL sandbox escape was possible (CVE-2026-65906)

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 TeamCity version 2025.11.6, 2026.1.2 or later.

See Also

http://www.nessus.org/u?6dd8b7db

Plugin Details

Severity: Critical

ID: 344573

File Name: teamcity_CVE-2026-65906.nasl

Version: 1.2

Type: Combined

Agent: windows, macosx, unix

Family: Misc.

Published: 9/10/2026

Updated: 9/11/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Enable CGI Scanning: true

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.88

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-65906

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

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

Vulnerability Information

CPE: cpe:/a:jetbrains:teamcity

Required KB Items: installed_sw/JetBrains TeamCity

Exploit Ease: No known exploits are available

Patch Publication Date: 7/23/2026

Vulnerability Publication Date: 7/16/2026

Reference Information

CVE: CVE-2026-65906

CWE: 94

IAVA: 2026-A-0686