Missing Release of Memory after Effective Lifetime Affecting org.springframework:spring-webflux package, versions [5.3.0,6.0.0)[6.1.0-M1,6.2.19)[7.0.0-M1,7.0.8)
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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- published27 Jul 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
CVE-2026-41840 (opens in a new tab)How to fix?
Upgrade org.springframework:spring-webflux to version 6.0.0, 6.2.19, 7.0.8 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 Missing Release of Memory after Effective Lifetime. via multipart request processing in Spring WebFlux. An attacker can cause denial of service by sending crafted multipart requests that trigger a memory leak during request processing, leading to excessive memory consumption and potentially causing the application to become unavailable.
Note: This is only exploitable if the application uses Spring WebFlux and exposes an endpoint that accepts multipart requests.