Vulnerability · Published Oct 16, 2026 · Assigned by VulnCheck

CVE-2026-111656ChatWiki through 2.9.6 Cross-Tenant IDOR via Form Filter Management Endpoints

Medium 5.4

In plain English

A medium-severity authorization bypass via user-controlled key in chatwiki from zhimaAi. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 87.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
zhimaAi	chatwiki	0 – through 2.9.6

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

https://hackmd.io/@hieuPenguinnn/chatwiki-form-filter-cross-tenant-idor third-party-advisory
https://github.com/zhimaAi/chatwiki/blob/v2.9.6/internal/app/chatwiki/business/manage/form.go#L878-L990 technical-description
https://github.com/zhimaAi/chatwiki/blob/v2.9.6/internal/app/chatwiki/business/manage/form.go#L1192-L1242 technical-description
VulnCheck Advisory: ChatWiki through 2.9.6 Cross-Tenant IDOR via Form Filter Management Endpoints third-party-advisory