## cve-2026-47864 - MEDIUM - Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution

- 種別: advisory
- 関連技術: spring, java
- CVE: CVE-2026-47864
- 公開日時: 2026-08-20T00:00:00.000Z
- 情報源: Spring Security Advisories (https://spring.io/security/cve-2026-47864)
- パーマリンク: https://vulnpulse.app/items/spring-security-483de5c33e60

SerializingHttpMessageConverter deserializes the body of incoming HTTP requests with a raw java.io.ObjectInputStream and no class filtering. Any request with Content-Type application/x-java-serialized-object whose body resolves to a Serializable type is read directly via readObject() . If an application using this converter on an inbound HTTP endpoint has any known Java deserialization "gadget" on its classpath, a remote, unauthenticated attacker can achieve arbitrary code execution. This is a classic unsafe Java deserialization flaw (CWE-502).