CVE-2026-41838

Spring Framework Predictable Session ID in WebSocket Module

Published Jun 9, 2026 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-q723-847q-5g8g Spring Framework Predictable Session ID in WebSocket Module
References
History
Type Values Removed Values Added
First Time appeared Vmware
Vmware spring Framework
CPEs cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*
Vendors & Products Vmware
Vmware spring Framework
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Spring
Spring spring Framework
Vendors & Products Spring
Spring spring Framework
Type Values Removed Values Added
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.
Title Spring Framework Predictable Session ID in WebSocket Module
Weaknesses CWE-330
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
vmware
Published
Updated
Jun 27, 2026, 8:57 PM
Reserved
Apr 22, 2026, 6:22 AM
Status
Analyzed
Published
Jun 9, 2026, 5:16 AM
Modified
Jul 23, 2026, 8:10 AM