Description
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.
Published: 2026-09-12
Score: 6.9 Medium
EPSS: n/a
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 12 Sep 2026 11:15:00 +0000

Type Values Removed Values Added
Description 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.
Title msgpack-java through 0.9.12 Stack Overflow via Nested Arrays
First Time appeared Msgpack
Msgpack messagepack
Weaknesses CWE-674
CPEs cpe:2.3:a:msgpack:messagepack:*:*:*:*:*:java:*:*
Vendors & Products Msgpack
Msgpack messagepack
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Subscriptions

Msgpack Messagepack
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-12T11:06:11.553Z

Reserved: 2026-09-12T02:03:23.163Z

Link: CVE-2026-90472

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-12T11:16:34.180

Modified: 2026-09-12T11:16:34.180

Link: CVE-2026-90472

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses