CVE-2026-56731: Zammad: Cross-Site Scripting in Ticket Notifications

Q: Who can exploit this issue?

A low-privilege authenticated user can exploit it through the standard ticket creation workflow. The attacker can place arbitrary HTML markup, including JavaScript event handlers, in a ticket title.

Q: Which deployments are affected?

Zammad versions prior to 7.0.1 are affected. The vulnerable behavior occurs when ticket titles are persisted without sanitization.

Q: What is the recommended remediation?

Upgrade Zammad to version 7.0.1, which fixes the issue.

Published Sep 25, 2026

Updated

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, a low-privilege authenticated user may inject arbitrary HTML markup, including JavaScript event handlers, into a ticket title via the standard ticket creation workflow. The title is persisted without sanitization. This issue is fixed in version 7.0.1.

Affected Software

1 affected component

Zammad Zammad<7.0.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Zammad to a version that resolves this vulnerability.
Fixed in 7.0.1

Event History

Sep 25, 2026

CVE Published

via MITRE·05:04 PM

Data Sourced

via MITRE·05:04 PM

DescriptionWeakness

Data Sourced

via NVD·06:17 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Who can exploit this issue?

A low-privilege authenticated user can exploit it through the standard ticket creation workflow. The attacker can place arbitrary HTML markup, including JavaScript event handlers, in a ticket title.

Which deployments are affected?