{"id":"CVE-2026-88861","revision":"c14052ec0dfc472880c65509842fc2fd","records":[{"revision":"c14052ec0dfc472880c65509842fc2fd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-88861","aliases":[],"title":"Capgo AAL1 Session MFA Bypass via Direct RBAC Authorization","description":"Capgo (Cap-go/capgo.app) contains an authentication bypass affecting all versions (no patched version available at time of publication). The Edge authorization path allows a password-only Supabase aal1 session to exercise privileged RBAC permissions even when the account has a verified MFA factor that has not been used for the session: the Edge JWT middleware (foundJWT() in supabase/functions/_backend/utils/hono_middleware.ts) accepts the JWT without validating its assurance level, and the direct RBAC path (checkPermission()/checkPermissionPg() in supabase/functions/_backend/utils/rbac.ts calling public.rbac_check_permission_direct()) authorizes by user ID without passing or checking the session aal, unlike the public.verify_mfa() control which correctly requires aal2. An attacker who knows only the victim's password can therefore authenticate, mint a persistent app-scoped app_admin API key that remains valid after the aal1 session is logged out, and perform privileged operations such as modifying production OTA channel configurations (validated by changing a public production channel from bundle 1.0.0 to 1.0.1), defeating the protection provided by MFA.","state":0,"publishedAt":"2026-09-10T13:05:18.415+00:00","modifiedAt":"2026-09-30T17:20:32.771+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:N/VA:N/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","score":8.3,"severity":"HIGH"}],"references":["https://github.com/Cap-go/capgo.app/security/advisories/GHSA-9435-5xw9-v29h","https://www.vulncheck.com/advisories/capgo-aal1-session-mfa-bypass-via-direct-rbac-authorization"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-88861","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-88861","identifiers":["CVE-2026-88861"]},"retained":false,"historicalAffected":[]}],"coverage":[]}