Insecure Direct Object Reference in ChatWiki Allows Access to Tenant Form Filters
CVE-2026-111656

5.3MEDIUM

Key Information:

Vendor

Zhimaai

Status
Chatwiki
Vendor
CVE Published:
16 October 2026

What is CVE-2026-111656?

ChatWiki versions up to 2.9.6 are susceptible to an insecure direct object reference vulnerability that allows authenticated users to exploit the system by manipulating form_id values. By sequentially entering these values, unauthorized users can access another tenant’s form filters and alter filter sort orders or retrieve sensitive filter rules, leading to potential data leakage and cross-tenant information access.

Affected Version(s)

chatwiki 0 <= 2.9.6

References

https://hackmd.io/@hieuPenguinnn/chatwiki-form-filter-cro...
third-party-advisory
https://github.com/zhimaAi/chatwiki/blob/v2.9.6/internal/...
technical-description
https://github.com/zhimaAi/chatwiki/blob/v2.9.6/internal/...
technical-description

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

hieuPenguinnn
.