{"cvss":9.5,"datePublished":"2026-06-29T00:00:00Z","dateUpdated":"2026-06-29T00:00:00Z","description":"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 allow bypass of multi-factor authentication.","dueDate":"2026-07-02T00:00:00Z","id":"CVE-2026-48558","kev_catalogs":["vulncheck"],"knownRansomwareCampaignUse":"Unknown","product":"SimpleHelp","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","severity":"CRITICAL","source":"vulncheck_kev","title":"SimpleHelp Authentication Bypass Vulnerability","vendor":"SimpleHelp "}