{"id":"CVE-2026-41726","aliases":["GHSA-xvfq-4q6q-gxx7"],"url":"https://o3.security/vulnerability/CVE-2026-41726","summary":"In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header","details":"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.\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.","published":"2026-06-09T23:48:51.048Z","modified":"2026-09-01T11:45:36.624416273Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00296,"percentile":0.21761,"asOf":"2026-09-02"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework.kafka:spring-kafka","fixedVersion":"4.0.6"},{"ecosystem":"Maven","name":"org.springframework.kafka:spring-kafka","fixedVersion":"3.3.16"},{"ecosystem":"Maven","name":"org.springframework.kafka:spring-kafka","fixedVersion":null},{"ecosystem":"Maven","name":"org.springframework.kafka:spring-kafka","fixedVersion":null},{"ecosystem":"Maven","name":"org.springframework.kafka:spring-kafka","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://spring.io/security/cve-2026-41726"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41726.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41726"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-01T11:45:36.624416273Z"}}