Vulnerabilities affecting this package (0)
| Vulnerability |
Summary |
Fixed by |
|
This package is not known to be affected by vulnerabilities.
|
Vulnerabilities fixed by this package (1)
| Vulnerability |
Summary |
Aliases |
|
VCID-mnu1-xpgp-6kgd
|
MessagePack for Java Vulnerable to Remote DoS via Malicious EXT Payload Allocation
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 attacker-controlled payload lengths. While MessagePack-Java parses extension headers lazily, it later trusts the declared EXT payload length when materializing the extension data. When ExtensionValue.getData() is invoked, the library attempts to allocate a byte array of the declared length without enforcing any upper bound. A malicious .msgpack file of only a few bytes can therefore trigger unbounded heap allocation, resulting in JVM heap exhaustion, process termination, or service unavailability. This vulnerability is triggered during model loading / deserialization, making it a model format vulnerability suitable for remote exploitation.
|
CVE-2026-21452
GHSA-cw39-r4h6-8j3x
|