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CVE-2026-90472

msgpack-java through 0.9.12 Stack Overflow via Nested Arrays

CVSS 4.0 6.9 MEDIUMCVSS 3.1 5.3 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-90472

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-90472

Published

msgpack-java

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "msgpack",
                    "product": "msgpack-java",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "0.9.12",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "packageURL": "pkg:maven/org.msgpack/msgpack-core"
                }

Original source record · Cite this exact observation · Complete original publisher JSON