CVE-2026-65906

CRITICAL

In JetBrains TeamCity before 2026.1.2, 2025.11.6 сode execution via Kotlin DSL sandbox escape was possible

Affects 1 product across 1 vendor.

CVSS 3.110.0
EPSS0.7%
Percentile50th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, can impact systems beyond the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-94: Code Injection

Attacker injects arbitrary code that is executed by the application process.

Related Attack Patterns (CAPEC)
CAPEC-35 Leverage Executable Code in Non-Executable Files
via CWE-94
CAPEC-77 Manipulating User-Controlled Variables
via CWE-94
CAPEC-242 Code Injection
via CWE-94

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A high severity vulnerability (CVE-2026-65906) affects the target system. In JetBrains TeamCity before 2026.1.2, 2025.11.6 сode execution via Kotlin DSL sandbox escape was possible

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Frequently Asked Questions
What is CVE-2026-65906?
A high severity vulnerability (CVE-2026-65906) affects the target system. In JetBrains TeamCity before 2026.1.2, 2025.11.6 сode execution via Kotlin DSL sandbox escape was possible
What is the CVSS score for CVE-2026-65906?
CVE-2026-65906 has CVSS 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. EPSS: 0.7%.
Is CVE-2026-65906 actively exploited?
No confirmed active exploitation of CVE-2026-65906 as of 2026-09-25.
How do I remediate CVE-2026-65906?
Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
What systems are affected by CVE-2026-65906?
CVE-2026-65906 affects Jetbrains Teamcity.
Vulnerability Details
CVE IDCVE-2026-65906
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published2026-07-23
Last Modified2026-08-11
ICS Relevance15%
Weakness (CWE)
Code Injection
SourceNVD
Official Description

In JetBrains TeamCity before 2026.1.2, 2025.11.6 сode execution via Kotlin DSL sandbox escape was possible

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductAffected Versions
Jetbrains Teamcity < 2025.11.6 ≥ 2026.1, < 2026.1.2
Remediation
View Vendor Advisory →
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 84 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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