Auth bypass in Formbricks
CVE-2026-110620
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H.
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/formbricks/formbricks/issues/7326 (issue-tracking)
- github.com/formbricks/formbricks/blob/4.8.7/apps/web/app/(app)/environments/[en… (technical-description)
- github.com/formbricks/formbricks/blob/4.8.7/apps/web/modules/organization/setti… (technical-description)
- github.com/formbricks/formbricks/commit/c7faa29437ea706eae411958b260bb5ad5c60e4f (patch)
- github.com/formbricks/formbricks/releases/tag/4.9.0 (release-notes)
- www.vulncheck.com/advisories/formbricks-before-4.9.0-cross-organization-idor-in… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110620?
- CVE-2026-110620 is a medium-severity vulnerability in Formbricks, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.8/10. Published 2026-10-14.
- How severe is CVE-2026-110620?
- Medium severity. CVSS v3 base score is 6.8 out of 10.