CVE-2026-123782 · AI agents & MCP
NO FIX YET · SEE WHAT TO DO
ChatWiki before 2.10.0 fails to check that a form field belongs to the caller's tenant in SaveFormField and UpdateFormRequired. An authenticated user can change another tenant's field names, descriptions, types and required flags, which disrupts how submitted entries are stored.
first public Nov 6, 2026 · 1 source
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Any ChatWiki deployment below 2.10.0 where several tenants share an instance and users have accounts. Single-tenant deployments or instances with only trusted users have a much smaller exposure. The sources do not describe a configuration that disables the flaw.
Not affected if single-tenant, version-2.10.0-or-later
Who cares chatwiki, multi-tenant, self-hosted
2.10.0.2.10.0 or later (the fixed version named in the advisory).ChatWiki before 2.10.0 contains an insecure direct object reference vulnerability in SaveFormField and UpdateFormRequired that allows authenticated users to modify other tenants' form fields. Attackers can pass their own form_id to satisfy the ownership check alongside another tenant's sequential form_field id to alter field names, descriptions, types and required flags, disrupting how submitted entries are stored.
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