---
id: CVE-2017-7957
title: >-
  XStream through 1.4.9, when a certain denyTypes workaround is not used,
  mishandles attempts to create an instance of the primitive type 'void' during
  unmarshalling, leading to a remote application crash, as demonstrated by an
  xstream.fro…
summary: >-
  XStream through 1.4.9, when a certain denyTypes workaround is not used,
  mishandles attempts to create an instance of the primitive type 'void' during
  unmarshalling, leading to a remote application crash, as demonstrated by an
  xstream.fro…
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-20
vendor: redhat
product: fuse
affected:
  - fuse = 1.0
  - jboss_middleware = 1
  - xstream <= 1.4.9
  - debian_linux = 8.0
  - debian_linux = 9.0
published: '2017-04-29'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:17:05.933'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2017-7957'
references:
  - url: 'http://www.debian.org/security/2017/dsa-3841'
    label: cve@mitre.org
  - url: 'http://www.securityfocus.com/bid/100687'
    label: cve@mitre.org
  - url: 'http://www.securitytracker.com/id/1039499'
    label: cve@mitre.org
  - url: 'http://x-stream.github.io/CVE-2017-7957.html'
    label: cve@mitre.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:1832'
    label: cve@mitre.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:2888'
    label: cve@mitre.org
  - url: 'https://access.redhat.com/errata/RHSA-2017:2889'
    label: cve@mitre.org
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/125800'
    label: cve@mitre.org
  - url: 'https://www-prd-trops.events.ibm.com/node/715749'
    label: cve@mitre.org
  - url: 'http://www.debian.org/security/2017/dsa-3841'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securityfocus.com/bid/100687'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securitytracker.com/id/1039499'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://x-stream.github.io/CVE-2017-7957.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:1832'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:2888'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2017:2889'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/125800'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www-prd-trops.events.ibm.com/node/715749'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.04928
epssPercentile: 0.92086
ingestedAt: '2026-10-08T22:11:53.691Z'
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-08T20:54:48.322148Z'
---

## Overview

XStream through 1.4.9, when a certain denyTypes workaround is not used, mishandles attempts to create an instance of the primitive type 'void' during unmarshalling, leading to a remote application crash, as demonstrated by an xstream.fromXML("<void/>") call.

## Affected

- `fuse = 1.0`
- `jboss_middleware = 1`
- `xstream <= 1.4.9`
- `debian_linux = 8.0`
- `debian_linux = 9.0`

## Remediation

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