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CVE-2026-90472— msgpack-java through 0.9.12 Stack Overflow via Nested Arrays

Quick assessment

Affected
msgpack msgpack-java
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

msgpack-java 在 0.9.12 及之前版本中存在一个栈溢出漏洞，位于 MessageUnpacker.unpackValue() 方法中。该方法在反序列化数组和映射时未对嵌套深度进行限制，允许递归地处理嵌套结构。攻击者可以构造包含深层嵌套数组的有效载荷，从而耗尽反序列化线程的栈空间，触发 StackOverflowError，导致每个请求的反序列化失败。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
msgpack msgpack-java ≤ 0.9.12 affected
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I. Basic Information for CVE-2026-90472

Vulnerability Information
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Vulnerability Title
msgpack-java through 0.9.12 Stack Overflow via Nested Arrays
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
msgpack msgpack-java 0 ~ 0.9.12 -

II. Public POCs for CVE-2026-90472

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III. Intelligence Information for CVE-2026-90472

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Patches & Fixes for CVE-2026-90472 (1)

Vendor Advisories for CVE-2026-90472 (1)

IV. Related Vulnerabilities

Same product: msgpack-java
Same vendor: msgpack
Same weakness: CWE-674

V. Comments for CVE-2026-90472

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