CVE-2026-41731 HIGH

CVE-2026-41731: In Spring for Apache Kafka, overly broad trusted-package matching in header mappers exposes JDK classes to deserialization

Vendor Spring
Product Spring for Apache Kafka
Weakness CWE-502 · Unsafe deserialization
Published June 9, 2026
Last update June 10, 2026
View on NVD All CVEs

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

Description

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.

Key dates

Disclosure timeline

June 9, 2026 CVE published
June 10, 2026 Record updated