CVE-2026-90472

msgpack-java through 0.9.12 contains a stack overflow vulnerability in MessageUnpacker.unpackValue() that recursively deserializes arrays and maps without nesting depth limits. Attackers can craft payloads with deeply nested arrays to exhaust the deserializing thread's stack and trigger StackOverflowError, causing per-request deserialization failures.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/msgpack/msgpack-java
https://github.com/msgpack/msgpack-java/blob/v0.9.12/msgpack-core/src/main/java/org/msgpack/core/MessageUnpacker.java#L646-L664
https://github.com/msgpack/msgpack-java/issues/1015
https://www.vulncheck.com/advisories/msgpack-java-through-0.9.12-stack-overflow-via-nested-arrays
https://github.com/msgpack/msgpack-java/issues/1015

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-12 11:16

Updated : 2026-09-14 17:17

NVD link : CVE-2026-90472

Mitre link : CVE-2026-90472

CVE.ORG link : CVE-2026-90472

JSON object : View

Products Affected

No product.

CWE

CWE-674

Uncontrolled Recursion

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