Resource exhaustion in Spring For Apache Kafka
CVE-2026-41726
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.
EPSS: 0.003 (22.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Spring For Apache Kafka — versions 4.0.0, 3.3.0, 3.2.0
- Vmware Spring_for_apache_kafka
Weakness classification (CWE)
References
- security@vmware.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-41726?
- CVE-2026-41726 is a medium-severity vulnerability in Spring For Apache Kafka, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-06-10.
- How severe is CVE-2026-41726?
- Medium severity. CVSS v3 base score is 6.5 out of 10.