CVE-2026-41838

MEDIUM

Spring Framework Predictable Session ID in WebSocket Module

Title source: cna

Description

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 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.

References (1)

Core 1

Core References

https://spring.io/security/cve-2026-41838

Scores

CVSS v3 4.8

EPSS 0.0017

EPSS Percentile 6.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-330

Status published

Products (5)

Spring/Spring Framework 5.3.0 - 5.3.49

Spring/Spring Framework 6.1.0 - 6.1.28

Spring/Spring Framework 6.2.0 - 6.2.19

Spring/Spring Framework 7.0.0 - 7.0.8

vmware/spring_framework 5.3.0 - 5.3.49

Published Jun 09, 2026

Tracked Since Jun 09, 2026