{"id":"CVE-2026-48558","revision":"a3d309b3ae264cda80d7f535541d623c","records":[{"revision":"a3d309b3ae264cda80d7f535541d623c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48558","aliases":[],"title":"SimpleHelp Authentication Bypass via Missing OIDC JWT Signature Verification","description":"SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication flow. When OIDC authentication is configured, identity tokens submitted during login are accepted without verifying their cryptographic signature. In a vulnerable configuration, a remote, unauthenticated attacker can submit a forged token containing arbitrary identity claims to obtain a fully authenticated technician session. In some configurations, this may also allow bypass of multi-factor authentication. No user interaction is required.","state":0,"publishedAt":"2026-06-12T17:07:05.453+00:00","modifiedAt":"2026-10-07T19:26:16.974+00:00","affected":[{"ecosystem":"Vendor product","name":"SimpleHelp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"affected\",\n                    \"vendor\": \"SimpleHelp\",\n                    \"product\": \"SimpleHelp\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"5.5.0\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"5.5.16\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"6.0\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"6.0 RC2\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","score":9.5,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10,"severity":"CRITICAL"}],"references":["https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/","https://simple-help.com/security/simplehelp-security-update-2026-05","https://simple-help.com/release-news"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48558","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48558","identifiers":["CVE-2026-48558"]},"retained":false,"historicalAffected":[]}],"coverage":[]}