CVE-2026-100253: CWE-184 in JetBrains TeamCity
In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 sandbox escape leading to code execution was possible via the versioned settings Kotlin DSL
AI Analysis
Technical Summary
This vulnerability (CWE-184) in JetBrains TeamCity allows an attacker with limited privileges to escape the sandbox environment through the versioned settings Kotlin DSL, leading to arbitrary code execution. The issue affects TeamCity versions prior to 2026.2, 2026.1.4, and 2025.11.8. The CVSS v3.1 score is 8.8, indicating high severity with network attack vector, low attack complexity, and no user interaction required.
Potential Impact
Successful exploitation can result in full code execution on the TeamCity server, compromising confidentiality, integrity, and availability of the system. This could allow attackers to execute arbitrary commands with the privileges of the TeamCity process.
Mitigation Recommendations
The vulnerability affects versions before 2026.2, 2026.1.4, and 2025.11.8. Users should upgrade to these fixed versions or later. No vendor advisory or patch links were provided, so verify the availability of official fixes from JetBrains. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-100253: CWE-184 in JetBrains TeamCity
Description
In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 sandbox escape leading to code execution was possible via the versioned settings Kotlin DSL
CVSS v3.1
Score 8.8high
Affected software
JetBrains
TeamCity
pkg:maven/org.jetbrains.teamcity/teamcity-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-184) in JetBrains TeamCity allows an attacker with limited privileges to escape the sandbox environment through the versioned settings Kotlin DSL, leading to arbitrary code execution. The issue affects TeamCity versions prior to 2026.2, 2026.1.4, and 2025.11.8. The CVSS v3.1 score is 8.8, indicating high severity with network attack vector, low attack complexity, and no user interaction required.
Potential Impact
Successful exploitation can result in full code execution on the TeamCity server, compromising confidentiality, integrity, and availability of the system. This could allow attackers to execute arbitrary commands with the privileges of the TeamCity process.
Mitigation Recommendations
The vulnerability affects versions before 2026.2, 2026.1.4, and 2025.11.8. Users should upgrade to these fixed versions or later. No vendor advisory or patch links were provided, so verify the availability of official fixes from JetBrains. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-25T17:02:01.996Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd2c302a4e24523d2ec2ef
Added to database: 09/30/2026, 15:35:12 UTC
Last enriched: 09/30/2026, 16:03:27 UTC
Last updated: 10/01/2026, 04:03:38 UTC
Views: 11
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.