AIKIDO-2026-914098
spring-webflux is vulnerable to Denial of Service (DoS)
53
Medium Risk
This Affects:
spring-webfluxTL;DR
spring-webflux PartEventHttpMessageReader ignores maxPartSize when maxInMemorySize is -1. A client can send oversized multipart parts and exhaust memory. This only applies to controllers that consume Flux<PartEvent>. The patch enforces maxPartSize even when in-memory buffering is unlimited.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and a WebFlux controller reads @RequestBody Flux<PartEvent> with maxInMemorySize set to -1.
Background info
spring-webflux is vulnerable to Denial of Service (DoS) in versions 6.1.0 - 7.0.8.
How to fix this
Upgrade the org.springframework:spring-webflux library to the patch version.
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