LOW | JUNE 08, 2026 | CVE-2026-41839
Description
A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.
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