---
id: CVE-2026-59324
title: >-
  When an IntegrationFlow uses .fluxTransform() with an asynchronous/reordering
  fluxFunction that emits raw payloads, concurrent requests on the same
  FluxMessageChannel subscription have their reply headers (replyChannel,
  errorChannel, cor…
summary: >-
  When an IntegrationFlow uses .fluxTransform() with an asynchronous/reordering
  fluxFunction that emits raw payloads, concurrent requests on the same
  FluxMessageChannel subscription have their reply headers (replyChannel,
  errorChannel, cor…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-362
published: '2026-08-27'
updated: '2026-08-28'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59324'
references:
  - url: 'https://spring.io/security/cve-2026-59324'
    label: security@vmware.com
tags:
  - nvd
epss: 0.00277
epssPercentile: 0.17865
ingestedAt: '2026-08-29T21:42:36.178Z'
---

## Overview

When an IntegrationFlow uses .fluxTransform() with an asynchronous/reordering fluxFunction that emits raw payloads, concurrent requests on the same FluxMessageChannel subscription have their reply headers (replyChannel, errorChannel, correlationId, any propagated security/tenant headers) copied from whichever message was most recently consumed upstream.
Spring Integration 7.1.0
Spring Integration 7.0.0 - 7.0.5
Spring Integration 6.5.0 - 6.5.10
Spring Integration 6.4.0 - 6.4.12
Spring Integration 5.5.21 and earlier

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.