What is CVE-2026-41838?

CVE-2026-41838 is a medium-severity vulnerability in Spring Framework, classified under Use of Insufficiently Random Values. CVSS score: 4.8/10. Published 2026-06-09.

How severe is CVE-2026-41838?

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

Vulnerability in Spring Framework

CVE-2026-41838

IDs for WebSocket sessions in the spring-websocket module are not cryptographically unpredictable, which may be possible to exploit in combination with inadequate authorization rules. Affected versions: Spring Framework 7.0.0 through 7.0…

EPSS: 0.002 (6.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Spring Framework — versions 7.0.0, 6.2.0, 6.1.0
Vmware Spring_framework

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

security@vmware.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-41838?: CVE-2026-41838 is a medium-severity vulnerability in Spring Framework, classified under Use of Insufficiently Random Values. CVSS score: 4.8/10. Published 2026-06-09.
How severe is CVE-2026-41838?: Medium severity. CVSS v3 base score is 4.8 out of 10.