CVE-2026-63006 — Zammad: HTML sanitizer API path allowlist bypass via interior path traversal in img src/srcset
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 us…
Published: 2026-09-25 · CVSS: 5.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7