CVE-2026-41727 In Spring for Apache Kafka, forged retry topic headers subvert retry routing and backoff behavior

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 retrytopic-attempts header to supply an out-of-range attempt count and cause the retry topic router to misidentify where the...

CVE-2026-41727

Summary: Spring for Apache Kafka’s retry topic infrastructure does not adequately validate user-controlled header values, allowing a crafted retry_topic-attempts header to supply an out-of-range attempt count and cause the retry topic router to misidentify a message’s position in the retry sequen...