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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-63006

Zammad: HTML sanitizer API path allowlist bypass via interior path traversal in img src/srcset

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

zammad zammad

  • < 7.1.2affected

References