---
id: CVE-2026-59322
title: >-
  The EmbeddedHeadersJsonMessageMapper defaults to an overly permissive header
  parsing posture in its constructor
summary: >-
  The EmbeddedHeadersJsonMessageMapper defaults to an overly permissive header
  parsing posture in its constructor. When decodeNativeFormat processes raw byte
  payloads, it deserializes embedded JSON headers into a plain Map and
  constructs a…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-20
published: '2026-08-27'
updated: '2026-08-28'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59322'
references:
  - url: 'https://spring.io/security/cve-2026-59322'
    label: security@vmware.com
tags:
  - nvd
epss: 0.00211
epssPercentile: 0.11689
ingestedAt: '2026-08-29T21:42:36.136Z'
---

## Overview

The EmbeddedHeadersJsonMessageMapper defaults to an overly permissive header parsing posture in its constructor. When decodeNativeFormat processes raw byte payloads, it deserializes embedded JSON headers into a plain Map and constructs a GenericMessage with MutableMessageHeaders without sanitizing or filtering untrusted header names by default.
Spring Integration 7.1.0
Spring Integration 7.0.0 - 7.0.5
Spring Integration 6.5.0 - 6.5.10
Spring Integration 6.4.0 - 6.4.12
Spring Integration 5.5.21 and earlier

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.