Quick answers
- Is CVE-2026-84463 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84463 being exploited in the wild.
- How severe is CVE-2026-84463?
- Informational severity, published 25 September 2026.
- Which products and versions are affected?
- Zammad prior to 7.1.2.
- Is there a fix for CVE-2026-84463?
- A patch was published on 2026: version 7.1.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-84463 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-84463?
- Check whether you run Zammad at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stored HTML injection vulnerability exists in the Knowledge Base video widget where user-supplied input is inserted into an iframe attribute without proper HTML escaping. An attacker with Knowledge Base editing rights can craft a malicious video widget value that breaks out of the attribute context and injects arbitrary HTML/JavaScript. When a user with session-switching permissions views the answer, the injected code makes a request to the session-switching endpoint, hijacking their active credentials.
Affected products
- Zammad Zammad prior to 7.1.2
Timeline
- 2026-09-25: disclosed
- 2026: patched: version 7.1.2