Quick answers
- Is CVE-2026-100265 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-100265 being exploited in the wild.
- How severe is CVE-2026-100265?
- Medium severity, with a CVSS score of 4.8, published 30 September 2026.
- Which products and versions are affected?
- Jetbrains Rider before 2026.2.1.
- Is there a fix for CVE-2026-100265?
- A patch was published on 2026-02: Rider 2026.2.1 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-100265 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-100265?
- Check whether you run Jetbrains Rider at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The AI Assistant in JetBrains Rider prior to version 2026.2.1 lacks a user confirmation requirement for third-party skill updates, allowing automatic installation without consent. This is a privilege escalation and code execution vulnerability triggered by the auto-update mechanism. The vulnerability affects the IDE's extension/skill management system.
Affected products
- JetBrains Rider before 2026.2.1
Timeline
- 2026-09-30: disclosed
- 2026-02: patched: Rider 2026.2.1 released