CVE-2026-41726

EUVD-2026-35903
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 21%
Affected Products (NVD)
VendorProductVersion
vmwarespring_for_apache_kafka
𝑥
< 2.8.12
vmwarespring_for_apache_kafka
2.9.0 ≤
𝑥
< 2.9.14
vmwarespring_for_apache_kafka
3.2.0 ≤
𝑥
< 3.2.14
vmwarespring_for_apache_kafka
3.3.0 ≤
𝑥
< 3.3.15.1
vmwarespring_for_apache_kafka
4.0.0 ≤
𝑥
< 4.0.5.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://spring.io/security/cve-2026-41726