{"id":"CVE-2026-41731","aliases":["GHSA-xq69-5h5v-x9x4"],"title":"In Spring for Apache Kafka, overly broad trusted-package matching in header mappers exposes JDK classes to deserialization","summary":"In Spring for Apache Kafka, overly broad trusted-package matching in header mappers exposes JDK classes to deserialization","severity":"high","cvss":8.1,"cwe":["CWE-502"],"vendor":"springframework","product":"org.springframework.kafka:spring-kafka","ecosystem":"maven","affected":["org.springframework.kafka:spring-kafka >= 4.0.0, <= 4.0.5","org.springframework.kafka:spring-kafka >= 3.3.0, <= 3.3.15","org.springframework.kafka:spring-kafka >= 3.2.0, <= 3.2.13","org.springframework.kafka:spring-kafka >= 2.9.0, <= 2.9.13","org.springframework.kafka:spring-kafka <= 2.8.11"],"patched":["org.springframework.kafka:spring-kafka 4.0.6","org.springframework.kafka:spring-kafka 3.3.16"],"published":"2026-06-10","updated":"2026-06-12","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-xq69-5h5v-x9x4","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41731"},{"url":"https://spring.io/security/cve-2026-41731"},{"url":"https://github.com/advisories/GHSA-xq69-5h5v-x9x4"}],"tags":["ghsa","maven"],"epss":0.0051,"epssPercentile":0.42485,"ingestedAt":"2026-07-07T15:41:59.587Z","slug":"CVE-2026-41731","body":"## Overview\n\nJsonKafkaHeaderMapper 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.\n\nAffected versions:\nSpring 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.\n\n## Affected packages\n\n- `org.springframework.kafka:spring-kafka >= 4.0.0, <= 4.0.5`\n- `org.springframework.kafka:spring-kafka >= 3.3.0, <= 3.3.15`\n- `org.springframework.kafka:spring-kafka >= 3.2.0, <= 3.2.13`\n- `org.springframework.kafka:spring-kafka >= 2.9.0, <= 2.9.13`\n- `org.springframework.kafka:spring-kafka <= 2.8.11`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `org.springframework.kafka:spring-kafka 4.0.6`\n- `org.springframework.kafka:spring-kafka 3.3.16`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}