CVE-2026-41731
In Spring for Apache Kafka, overly broad trusted-package matching in header mappers exposes JDK classes to deserialization
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
JsonKafkaHeaderMapper and the deprecated DefaultKafkaHeaderMapper matched type headers against trusted packages using a prefix check, meaning that trusting any package implicitly trusted all of its subpackages. Combined with Jackson's default bean deserialization, a producer could supply crafted header values that caused the consumer to deserialize arbitrary JDK types. 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.
| CWE | CWE-502 |
| Vendor | spring |
| Product | spring for apache kafka |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Jun 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Spring / Spring for Apache Kafka
4.0.0 < 4.0.6 3.3.0 < 3.3.16 3.2.0 < 3.2.14 2.9.0 < 2.9.14 2.8.0 < 2.8.12