CVE-2026-56731 Zammad: Cross-Site Scripting in Ticket Notifications
A low-privilege user can inject malicious JavaScript into ticket titles, potentially leading to code execution or account takeover in Zammad.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-56731?
CVE-2026-56731 is a high-severity cross-site scripting vulnerability in zammad, published on 25 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-56731?
How do I fix CVE-2026-56731?
No fix has been published for CVE-2026-56731 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-56731 being exploited?
There is no known exploitation of CVE-2026-56731 in the wild and no public exploit code.
Sources
Also known as GHSA-p9xp-gx8r-4397.