Auth bypass in Zhimaai Chatwiki
CVE-2026-123782
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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
- github.com/zhimaAi/chatwiki (product)
- SaveFormField (technical-description)
- UpdateFormRequired (technical-description)
- Fix merge commit (PR #183) (patch)
- Fix commit d1ca145 (patch)
- GitHub Issue #182 (issue-tracking)
- chatwiki v2.10.0 Release Notes (release-notes)
- Researcher write-up (technical-description)
- VulnCheck Advisory: ChatWiki before 2.10.0 Cross-Tenant IDOR via SaveFormField and UpdateFormRequired (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123782?
- CVE-2026-123782 is a medium-severity vulnerability in Zhimaai Chatwiki, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-11-06.
- How severe is CVE-2026-123782?
- Medium severity. CVSS v3 base score is 4.3 out of 10.