---
id: CVE-2026-84464
title: Zammad is a web based open source helpdesk/customer support system
summary: >-
  Zammad is a web based open source helpdesk/customer support system. Prior to
  7.1.2, zammad's External Data Source feature, used to look up records from an
  external system, did not properly verify whether a user was allowed to see a
  speci…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-200
  - CWE-639
  - CWE-863
vendor: zammad
product: zammad
affected:
  - zammad < 7.1.2
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:17:57.917'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84464'
references:
  - url: >-
      https://github.com/zammad/zammad/commit/34bdf46273adbea03821ac7157c8beaacde03a4b
    label: security-advisories@github.com
  - url: 'https://github.com/zammad/zammad/security/advisories/GHSA-jvm2-cr58-4qxp'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T19:03:37.637657Z'
cvssSource: cna
ingestedAt: '2026-09-25T19:15:38.965Z'
epss: 0.0029
epssPercentile: 0.19321
---

## Overview

Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, zammad's External Data Source feature, used to look up records from an external system, did not properly verify whether a user was allowed to see a specific ticket, user, group, or organization before including its details in a request to that external system. An authenticated user, including one with only basic customer access, could exploit this by referencing another record's ID, and thereby view details of tickets, customer accounts, teams, or organizations that did not belong to them. This issue is fixed in version 7.1.2.

## Remediation

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