CVE-2026-59324

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

State: Published
Severity: 8.2 High
Published: Aug 27, 2026
Updated: Aug 28, 2026
Reserved: Jul 4, 2026

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

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N	vmware

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
Spring IntegrationSpring	7.1.0Affected 7.0.0 through 7.0.5Affected 6.5.0 through 6.5.10Affected 6.4.0 through 6.4.12Affected 5.5.21 and earlierAffected

References

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

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