Generation of Predictable Numbers or Identifiers Affecting org.springframework:spring-websocket package, versions [5.3.0, 6.0.0)[6.1.0, 6.2.19)[7.0.0-M1, 7.0.8)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGSPRINGFRAMEWORK-17254123
- published9 Jun 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
NewCVE-2026-41838 (opens in a new tab)How to fix?
Upgrade org.springframework:spring-websocket to version 6.0.0, 6.2.19, 7.0.8 or higher.
Overview
org.springframework:spring-websocket is a framework that provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.
Affected versions of this package are vulnerable to Generation of Predictable Numbers or Identifiers via predictable WebSocket session identifiers in the spring-websocket module. An attacker can guess or predict valid WebSocket session IDs due to insufficient randomness in session identifier generation. In environments with inadequate authorization controls, this may allow unauthorized access to or interaction with other users' WebSocket sessions.
Note: Successful exploitation typically requires inadequate authorization rules.