Incorrect Authorization Affecting org.springframework:spring-webflux package, versions [5.3.0,6.0.0)
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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- published9 Jun 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
NewCVE-2026-41847 (opens in a new tab)How to fix?
Upgrade org.springframework:spring-webflux to version 6.0.0 or higher.
Overview
org.springframework:spring-webflux is a Spring Framework module that contains support for reactive HTTP and WebSocket clients as well as for reactive server web applications including REST, HTML browser, and WebSocket style interactions.
Affected versions of this package are vulnerable to Incorrect Authorization via request handling in the Kotlin Router DSL. An attacker can bypass security controls implemented through request-wrapping filters because modifications made to a ServerRequest by a filter are silently discarded before reaching downstream handlers. As a result, handlers receive the original unmodified request, causing security-related request enrichment, validation, or authorization logic to be ineffective.
Note: This is only exploitable if the application uses Spring WebFlux, the Kotlin Router DSL, and security-sensitive filters that pass a modified or wrapped ServerRequest to subsequent handlers.