CVE-2026-100265: CWE-494 in JetBrains Rider
CVE-2026-100265 is a medium severity vulnerability in JetBrains Rider before version 2026.2.1. The issue involves the AI Assistant component, which could auto-update third-party skills without requiring user confirmation. This behavior could lead to unintended changes in the software environment.
AI Analysis
Technical Summary
This vulnerability (CWE-494) affects JetBrains Rider versions prior to 2026.2.1. The AI Assistant feature could automatically update third-party skills without explicit user consent, potentially allowing unauthorized or unexpected modifications. The CVSS 3.1 score is 4.8, indicating a medium impact with network attack vector, high attack complexity, no privileges required, no user interaction, and limited confidentiality and integrity impact.
Potential Impact
The vulnerability could allow an attacker to cause the AI Assistant to update third-party skills without user approval, potentially leading to unauthorized code or configuration changes. The impact is limited to confidentiality and integrity with no impact on availability. There are no known exploits in the wild.
Mitigation Recommendations
A fix is available in JetBrains Rider version 2026.2.1. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are indicated.
CVE-2026-100265: CWE-494 in JetBrains Rider
Description
CVE-2026-100265 is a medium severity vulnerability in JetBrains Rider before version 2026.2.1. The issue involves the AI Assistant component, which could auto-update third-party skills without requiring user confirmation. This behavior could lead to unintended changes in the software environment.
CVSS v3.1
Score 4.8medium
Affected software
JetBrains
Rider
pkg:github/jetbrains/RiderRun 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-494) affects JetBrains Rider versions prior to 2026.2.1. The AI Assistant feature could automatically update third-party skills without explicit user consent, potentially allowing unauthorized or unexpected modifications. The CVSS 3.1 score is 4.8, indicating a medium impact with network attack vector, high attack complexity, no privileges required, no user interaction, and limited confidentiality and integrity impact.
Potential Impact
The vulnerability could allow an attacker to cause the AI Assistant to update third-party skills without user approval, potentially leading to unauthorized code or configuration changes. The impact is limited to confidentiality and integrity with no impact on availability. There are no known exploits in the wild.
Mitigation Recommendations
A fix is available in JetBrains Rider version 2026.2.1. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-25T17:02:06.388Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd2c322a4e24523d2ec306
Added to database: 09/30/2026, 15:35:14 UTC
Last enriched: 09/30/2026, 15:51:00 UTC
Last updated: 10/01/2026, 03:42:38 UTC
Views: 11
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