CISA KEV: CVE-2026-48558 — SimpleHelp SimpleHelp actively exploited

SimpleHelp Authentication Bypass Vulnerability. SimpleHelp contains 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