---
id: CVE-2026-95616
title: >-
  An integer overflow in WSS4J's DER bounds check lets an oversized allocation
  pass validation
summary: >-
  An integer overflow in WSS4J's DER bounds check lets an oversized allocation
  pass validation. An unauthenticated attacker can send a SOAP message carrying
  an X.509 certificate whose SubjectKeyIdentifier extension declares a length of
  0x7…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-190
vendor: Apache Software Foundation
product: 'org.apache.wss4j:wss4j-ws-security-common'
affected:
  - 'org.apache.wss4j:wss4j-ws-security-common >= 4.0.0 < 4.0.2'
  - 'org.apache.wss4j:wss4j-ws-security-common >= 3.0.0 < 3.0.6'
  - 'org.apache.wss4j:wss4j-ws-security-common < 2.4.4'
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T14:18:04.733'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-95616'
references:
  - url: 'https://lists.apache.org/thread.html/sdf0fsphkg4qbj7nh2brjgwvcmd67hct'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/30/14'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-30T12:43:35.342143Z'
ingestedAt: '2026-09-30T13:03:51.968Z'
---

## Overview

An integer overflow in WSS4J's DER bounds check lets an oversized allocation pass validation. An unauthenticated attacker can send a SOAP message carrying an X.509 certificate whose SubjectKeyIdentifier extension declares a length of 0x7FFFFFFF; WSS4J decodes this while resolving the signature's key reference, before the message is authenticated, so an eleven-byte extension triggers a 2 GB allocation. Repeated requests exhaust server memory.
Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.

## Remediation

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