# CVE-2026-48558

## Summary

- **CVE ID:** CVE-2026-48558
- **Severity:** CRITICAL
- **CVSS Score:** 10 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H)
- **CWE:** CWE-347
- **Published:** Jun 12, 2026
- **Last Modified:** Jul 14, 2026

## 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.

## Affected Products

- SimpleHelp — SimpleHelp (5.5.0)
- SimpleHelp — SimpleHelp (6.0)

## References

- [CNA](https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/)
- [CNA](https://simple-help.com/security/simplehelp-security-update-2026-05)
- [CNA](https://simple-help.com/release-news)
- [CISA-ADP](https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48558)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 64.31%
- **EPSS Percentile:** 99.2

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Jun 29, 2026
- **Due Date:** Jul 2, 2026

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._