Auth bypass in Zhimaai Chatwiki
CVE-2026-111656
ChatWiki through 2.9.6 contains an insecure direct object reference vulnerability that allows authenticated users to access another tenant's form filters by supplying arbitrary form_id values. Attackers can send sequential form_id values to getFormFilterList, getFormFilterInfo and updateFormFilterSort to read filter rules and overwrite another tenant's filter sort order.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/chatwiki-form-filter-cross-tenant-idor (third-party-advisory)
- github.com/zhimaAi/chatwiki/blob/v2.9.6/internal/app/chatwiki/business/manage/f… (technical-description)
- github.com/zhimaAi/chatwiki/blob/v2.9.6/internal/app/chatwiki/business/manage/f… (technical-description)
- VulnCheck Advisory: ChatWiki through 2.9.6 Cross-Tenant IDOR via Form Filter Management Endpoints (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111656?
- CVE-2026-111656 is a medium-severity vulnerability in Zhimaai Chatwiki, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-10-16.
- How severe is CVE-2026-111656?
- Medium severity. CVSS v3 base score is 5.4 out of 10.