AIKIDO-2026-699706
spring-webflux is vulnerable to Origin Validation Error
48
Medium Risk
This Affects:
spring-webfluxTL;DR
spring-webflux functional endpoints can skip header predicates on CORS pre-flight when deployed with DispatcherServlet. A crafted OPTIONS request may therefore reach a route that should have been rejected. Applications that do not combine WebFlux functional routes with the servlet dispatcher are not affected. The patch evaluates header predicates on pre-flight requests.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and WebFlux functional endpoints with header predicates are deployed behind DispatcherServlet.
Background info
spring-webflux is vulnerable to Origin Validation Error in versions 5.2.5 - 7.0.8.
How to fix this
Upgrade the org.springframework:spring-webflux library to the patch version.
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