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Learn moreCVE-2026-41838: Spring Framework Predictable Session ID in WebSocket Module
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 Spring Products and Versions
Spring Framework:
- 7.0.0 - 7.0.7
- 6.2.0 - 6.2.18
- 6.1.0 - 6.1.27
- 5.3.0 - 5.3.48
Versions that are no longer supported are also affected.
Mitigation
Users of affected versions should upgrade to the corresponding fixed version.
| Affected version(s) | Fix version | Availability |
|---|---|---|
| 7.0.x | 7.0.8 | OSS |
| 7.0.7.1 | Commercial | |
| 6.2.x | 6.2.19 | OSS |
| 6.2.18.1 | Commercial | |
| 6.1.x | 6.1.28 | Commercial |
| 5.3.x | 5.3.49 | Commercial |
No further mitigation steps are necessary.
Credit
This issue was discovered internally.
References
History
- 2026-06-08: Initial vulnerability report published.
Reporting a vulnerability
To report a security vulnerability for a project within the Spring portfolio, see the Security Policy
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