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Medium · 6.5 CVE-2026-41726 EUVD-2026-35903GHSA-xvfq-4q6q-gxx7

In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header

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

Description

When an application opts into DelegatingDeserializer, a producer can grow the consumer's heap without bound by sending records with unique random spring.kafka.serialization.selector header values, eventually causing GC thrash and OutOfMemoryError.

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