Allocation of Resources Without Limits or Throttling in Spring for Apache Kafka - CVE-2026-41726
Published: August 31, 2026
Vulnerability identifier: #VU146401
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-41726
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled memory allocation in DelegatingDeserializer when processing records with user-controlled spring.kafka.serialization.selector header values. A remote user can send records with unique random selector header values to cause a denial of service.
Only deployments that explicitly configured DelegatingDeserializer are affected.
Affected software
Spring for Apache Kafka
How to mitigate CVE-2026-41726
Install security update from vendor's website.
Spring for Apache Kafka - addressed in versions 2.8.12, 2.9.14, 3.2.14, 3.3.15.1, 3.3.16, 4.0.5.1, 4.0.6