{"basis":"claimed","id":"CVE-2026-48558","name":"SimpleHelp Authentication Bypass Vulnerability","vendorProject":"SimpleHelp ","product":"SimpleHelp","publishedAt":"2026-06-12","cvss":{"score":9.5,"severity":"CRITICAL","version":"4.0"},"exploited":{"kevAdded":"2026-06-29","dueDate":"2026-07-02","ransomware":false},"epss":{"score":0.77659,"percentile":0.99564,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"none","firstOn":null,"daysToRule":null},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"none","firstOn":null,"daysToRule":null},"fastly":{"status":"no_history","firstOn":null,"daysToRule":null},"f5":{"status":"none","firstOn":null,"daysToRule":null},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"none","firstOn":null,"daysToRule":null}},"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. 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