What is CVE-2026-123844?

CVE-2026-123844 is a medium-severity vulnerability in Jetbrains Intellij Idea, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-11-06.

How severe is CVE-2026-123844?

Medium severity. CVSS v3 base score is 5.3 out of 10.

SSRF in Jetbrains Intellij Idea

CVE-2026-123844

In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/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 Intellij Idea

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

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

Frequently asked questions

What is CVE-2026-123844?: CVE-2026-123844 is a medium-severity vulnerability in Jetbrains Intellij Idea, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-11-06.
How severe is CVE-2026-123844?: Medium severity. CVSS v3 base score is 5.3 out of 10.