Description

Spring MVC and WebFlux applications are vulnerable to Information Disclosure attacks when resolving static resources.

More precisely, an application can be vulnerable when all the following are true:

• The application uses Spring MVC or Spring WebFlux.
• The application has configured several resource handlers, using different resource locations.
• At least one of the resource handlers requires authentication to access resources.
• The application has configured a shared cache for these configurations.

When all the conditions above are met, an attacker can get access to a protected resource if a publicly available resource with the same name was resolved first and cached.

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.

No further mitigation steps are necessary.

Credit

This issue was discovered internally.

References

• https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N&version=3.1

History

• 2026-06-08: Initial vulnerability report published.