MessagePack for Java Vulnerable to Remote DoS via Malicious EXT Payload Allocation

Summary Affected Components: org.msgpack.core.MessageUnpacker.readPayload org.msgpack.core.MessageUnpacker.unpackValue org.msgpack.value.ExtensionValue.getData A denial-of-service vulnerability exists in MessagePack for Java when deserializing .msgpack files containing EXT32 objects with...

EUVD-2026-0750

MessagePack for Java Vulnerable to Remote DoS via Malicious EXT Payload Allocation...

GHSA-CW39-R4H6-8J3X MessagePack for Java Vulnerable to Remote DoS via Malicious EXT Payload Allocation

Summary Affected Components: org.msgpack.core.MessageUnpacker.readPayload org.msgpack.core.MessageUnpacker.unpackValue org.msgpack.value.ExtensionValue.getData A denial-of-service vulnerability exists in MessagePack for Java when deserializing .msgpack files containing EXT32 objects with...

PT-2026-6411

Summary Affected Components: org.msgpack.core.MessageUnpacker.readPayload org.msgpack.core.MessageUnpacker.unpackValue org.msgpack.value.ExtensionValue.getData A denial-of-service vulnerability exists in MessagePack for Java when deserializing .msgpack files containing EXT32 objects with...

CVE-2026-21452

MessagePack for Java is a serializer implementation for Java. A denial-of-service vulnerability exists in versions prior to 0.9.11 when deserializing .msgpack files containing EXT32 objects with attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later...

Memory Allocation with Excessive Size Value

Overview Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the deserialization process of .msgpack files containing EXT32 objects. An attacker can exhaust system memory and cause service unavailability by submitting a specially crafted .msgpack fil...

DEBIAN-CVE-2026-21452

MessagePack for Java is a serializer implementation for Java. A denial-of-service vulnerability exists in versions prior to 0.9.11 when deserializing .msgpack files containing EXT32 objects with attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later...

CVE-2026-21452

MessagePack for Java is a serializer implementation for Java. A denial-of-service vulnerability exists in versions prior to 0.9.11 when deserializing .msgpack files containing EXT32 objects with attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later...

UBUNTU-CVE-2026-21452

MessagePack for Java is a serializer implementation for Java. A denial-of-service vulnerability exists in versions prior to 0.9.11 when deserializing .msgpack files containing EXT32 objects with attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later...

CVE-2026-21452 MessagePack-Java Vulnerable to Remote Denial of Service via Malicious .msgpack Model File Triggering Unbounded EXT Payload Allocation

MessagePack for Java is a serializer implementation for Java. A denial-of-service vulnerability exists in versions prior to 0.9.11 when deserializing .msgpack files containing EXT32 objects with attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later...

CVE-2026-21452 MessagePack-Java Vulnerable to Remote Denial of Service via Malicious .msgpack Model File Triggering Unbounded EXT Payload Allocation

MessagePack for Java is a serializer implementation for Java. A denial-of-service vulnerability exists in versions prior to 0.9.11 when deserializing .msgpack files containing EXT32 objects with attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later...

PT-2026-1132

Name of the Vulnerable Software and Affected Versions MessagePack for Java versions prior to 0.9.11 Description A denial-of-service issue exists in MessagePack for Java when processing .msgpack files. Specifically, versions before 0.9.11 are susceptible to unbounded heap allocation when...

CVE-2026-21452: Uncontrolled Resource Consumption

MessagePack for Java is a serializer implementation for Java. A denial-of-service vulnerability exists in versions prior to 0.9.11 when deserializing .msgpack files containing EXT32 objects with attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later...