Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Simple-Help | Simplehelp | < 5.5.16 |
Related Weaknesses (CWE)
References
- https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authenThird Party Advisory
- https://simple-help.com/release-newsRelease Notes
- https://simple-help.com/security/simplehelp-security-update-2026-05PatchVendor Advisory
- https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrTechnical DescriptionThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-US Government Resource
FAQ
What is CVE-2026-48558?
CVE-2026-48558 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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 token...
How severe is CVE-2026-48558?
CVE-2026-48558 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-48558?
Check the references section above for vendor advisories and patch information. Affected products include: Simple-Help Simplehelp.