Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110620Formbricks before 4.9.0 Cross-Organization IDOR in Server Actions via organizationId

Medium 6.8

In plain English

A medium-severity authorization bypass via user-controlled key in formbricks from formbricks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium

Exploit odds (30 days)0.6%top 53.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Formbricks before 4.9.0 contains an authorization bypass vulnerability in server actions like resetSurveyAction and updateSegmentAction that fail to verify resource ownership against the supplied organizationId. Authenticated owners or managers of any organization can pair their own organization identifier with victim resource IDs to delete survey responses, modify segments and quotas, or alter pending invitations.

Affected products (as reported)

Vendor	Product	Versions
formbricks	formbricks	0 – before 4.9.0

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

References

https://github.com/formbricks/formbricks/issues/7326 issue-tracking
https://github.com/formbricks/formbricks/blob/4.8.7/apps/web/app/(app)/environments/%5BenvironmentId%5D/surveys/%5BsurveyId%5D/(analysis)/summary/actions.ts#L65-L95 technical-description
https://github.com/formbricks/formbricks/blob/4.8.7/apps/web/modules/organization/settings/teams/actions.ts#L33-L50 technical-description
https://github.com/formbricks/formbricks/commit/c7faa29437ea706eae411958b260bb5ad5c60e4f patch
Formbricks 4.9.0 Release Notes release-notes
VulnCheck Advisory: Formbricks before 4.9.0 Cross-Organization IDOR in Server Actions via organizationId third-party-advisory