What is CVE-2026-100265?

CVE-2026-100265 is a medium-severity vulnerability in Jetbrains Rider, classified under Download of Code Without Integrity Check. CVSS score: 4.8/10. Published 2026-09-30.

How severe is CVE-2026-100265?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Jetbrains Rider

CVE-2026-100265

In JetBrains Rider before 2026.2.1 aI Assistant could auto-update third-party skills without user confirmation

Published 2026-09-30 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Jetbrains Rider

Weakness classification (CWE)

CWE-494 — Download of Code Without Integrity Check

References

www.jetbrains.com/privacy-security/issues-fixed/

Frequently asked questions

What is CVE-2026-100265?: CVE-2026-100265 is a medium-severity vulnerability in Jetbrains Rider, classified under Download of Code Without Integrity Check. CVSS score: 4.8/10. Published 2026-09-30.
How severe is CVE-2026-100265?: Medium severity. CVSS v3 base score is 4.8 out of 10.