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Medium · 6.5 CVE-2026-41727 EUVD-2026-35904GHSA-53w6-v7cv-fc9h

In Spring for Apache Kafka, forged retry topic headers subvert retry routing and backoff behavior

Published Jun 9, 2026 · Updated Jun 27, 2026 · Assigned by vmware

Description

Spring Kafka's retry topic infrastructure did not sufficiently validate user-controlled header values before acting on them. A producer could send a record with a crafted retry_topic-attempts header to supply an out-of-range attempt count and cause the retry topic router to misidentify where the message was in the retry sequence.

Affected versions:
Spring for Apache Kafka 4.0.0 through 4.0.5; 3.3.0 through 3.3.15; 3.2.0 through 3.2.13; 2.9.0 through 2.9.13; 2.8.0 through 2.8.11.

Affected products

VendorProductAffectedFixed
Spring Spring for Apache Kafka 4.0.0 – < 4.0.5.1, 3.3.0 – < 3.3.15.1, 3.2.0 – < 3.2.14, 2.9.0 – < 2.9.14, 2.8.0 – < 2.8.12 4.0.5.1

Affected packages

References