Vulnerability · Published Aug 27, 2026 · Assigned by vmware

CVE-2026-59324fluxTransform shared RequestMessageHolder causes cross-message header leakage under async fluxFunction

High 8.2

In plain English

A high-severity race condition in Spring Integration from Spring. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.3%top 79.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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

Affected products (as reported)

Vendor	Product	Versions
Spring	Spring Integration	7.1.07.0.0 – through 7.0.56.5.0 – through 6.5.106.4.0 – through 6.4.120 – through 5.5.21

Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

References

https://spring.io/security/cve-2026-59324