CVE-2026-63006

Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, attacker-controlled HTML in inbound emails or tickets could bypass the image URL sanitizer using path traversal sequences. When an authenticated agent views the content, the browser resolves the URL to a protected API endpoint and sends the request with the agent's session cookie, enabling side effects such as forced logout without any user interaction. This issue is fixed in version 7.1.2.

• https://github.com/zammad/zammad/commit/856af85c12413087d6a74ffee25b16048a5ed8c3
• https://github.com/zammad/zammad/security/advisories/GHSA-33p2-cm7w-62g3