What is CVE-2026-123858?

CVE-2026-123858 is a medium-severity vulnerability in Jetbrains Phpstorm, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 4.4/10. Published 2026-11-06.

How severe is CVE-2026-123858?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Jetbrains Phpstorm

CVE-2026-123858

In JetBrains PhpStorm before 2026.3 project files could be automatically uploaded to a deployment server from untrusted projects

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

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 Phpstorm

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

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

Frequently asked questions

What is CVE-2026-123858?: CVE-2026-123858 is a medium-severity vulnerability in Jetbrains Phpstorm, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 4.4/10. Published 2026-11-06.
How severe is CVE-2026-123858?: Medium severity. CVSS v3 base score is 4.4 out of 10.