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20impact

Spring Framework Predictable Session ID in WebSocket Module

Spring Framework · CVE-2026-41838
0 news outlets0 CERTs and agencies0 researchers

What is it?

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.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
4.8
EPSS
0.3%
First seen
2 d ago
Status
corroborated

All Spring vulnerabilities