CVE-2026-41726CWE-770

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

Medium · published June 9, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00420 · 35.3th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-06-09T23:48Z
EPSS history
Timeline
  • 09 JUN 23:48Z
    In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header
    cvelistv5