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CVE-2026-4855810.0/CRITICALEPSS 94.0%CISA KEV
2026-06-12

SimpleHelp Authentication Bypass via Missing OIDC Signature Verification (CVE-2026-48558)

[Affected Scope] SimpleHelp versions 5.5.15 and prior, and 6.0 pre-release versions with OIDC authentication configured

[Impact] Unauthenticated remote attackers can forge identity tokens to bypass authentication, gain full technician sessions, and potentially bypass multi-factor authentication (MFA)

[Mitigation] Immediately upgrade SimpleHelp to the patched version or disable OIDC authentication until the patch is applied