---
id: CVE-2026-100227
title: >-
  Improper Verification of Cryptographic Signature vulnerability in Apache CXF's
  JAX-RS XML Security module
summary: >-
  Improper Verification of Cryptographic Signature vulnerability in Apache CXF's
  JAX-RS XML Security module. The JAX-RS XML Signature interceptors
  (XmlSigInHandler, XmlSigInInterceptor and the streaming XmlSecInInterceptor)
  did not ensure …
severity: none
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T16:33:39.007'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100227'
references:
  - url: 'https://lists.apache.org/thread.html/pst2oopnwt2rwhvkvmt5gdgwn36kq05m'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/09/11'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
ingestedAt: '2026-10-09T12:53:29.298Z'
---

## Overview

Improper Verification of Cryptographic Signature vulnerability in Apache CXF's JAX-RS XML Security module. The JAX-RS XML Signature interceptors (XmlSigInHandler, XmlSigInInterceptor and the streaming XmlSecInInterceptor) did not ensure that the XML passed to the application was covered by the signature. An attacker with any document signed by a trusted key could wrap it in unsigned content, which the application would then treat as signed.
Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

## Remediation

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