{"id":"CVE-2026-88864","revision":"ab73c67908ca400b926c68bd5678890f","records":[{"revision":"ab73c67908ca400b926c68bd5678890f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-88864","aliases":[],"title":"Capgo SSO Provider Authentication Bypass via PostgREST Direct Write","description":"Capgo (capgo.app) fails to restrict direct write access to the public.sso_providers table exposed through Supabase PostgREST. A holder of an ordinary Capgo full API key can insert a row with status='active' and enforce_sso=true, bypassing the intended backend SSO provisioning route (supabase/functions/_backend/private/sso/providers.ts) and its controls: the Enterprise plan requirement, SSO provider creation via the Supabase Management API, DNS TXT domain-ownership verification, the pending_verification → verified → active status transition, and issuance of a trusted provider ID by Supabase Auth. The forged row is trusted by SSO discovery and enforcement logic, including the unauthenticated login preflight endpoint /private/sso/check-domain, which then reports {\"has_sso\": true, \"enforce_sso\": true} for domains that were never verified, allowing attacker-controlled SSO enforcement to be asserted for arbitrary domains and disrupting normal login. All versions are affected; at the time of the advisory no patch was available.","state":0,"publishedAt":"2026-09-10T13:05:20.504+00:00","modifiedAt":"2026-09-30T17:20:34.18+00:00","affected":[{"ecosystem":"Vendor product","name":"capgo.app","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Cap-go\",\n                    \"product\": \"capgo.app\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThanOrEqual\": \"*\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/Cap-go/capgo.app/security/advisories/GHSA-xg7v-83qv-qfff","https://www.vulncheck.com/advisories/capgo-sso-provider-authentication-bypass-via-postgrest-direct-write"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-88864","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-88864","identifiers":["CVE-2026-88864"]},"retained":false,"historicalAffected":[]}],"coverage":[]}