CVE-2026-56732 Zammad: Malicious input in Ticket Body Enables Session Termination
Attackers can inject HTML into ticket bodies to force other users to log out, compromising session integrity in Zammad helpdesk.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-56732?
CVE-2026-56732 is a medium-severity cross-site scripting vulnerability in zammad, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, 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 7.0.2, vulnerability in Zammad's HTML sanitization allows injection of specific HTML elements into ticket bodies. When another user views the crafted ticket, the injected element can trigger a logout request, terminating the viewer's session. This vulnerability is fixed in 7.0.2.
Which versions are affected by CVE-2026-56732?
How do I fix CVE-2026-56732?
No fix has been published for CVE-2026-56732 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-2026-56732 being exploited?
There is no known exploitation of CVE-2026-56732 in the wild and no public exploit code.
Sources
Also known as GHSA-6rmm-28j9-q99q.