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TI-2026-35916 Aliases CVE-2026-48558GHSA-m93h-gjv2-fmq2

SimpleHelp Authentication Bypass via Missing OIDC JWT Signature Verification

Priority CRITICAL 100Exploited in the wildCWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-347.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2026-06-29CISA due date 2026-07-02
EPSS 0.80786 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed SimpleHelp (SimpleHelp): 5.5.16, 6.0 RC2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SimpleHelpSimpleHelp5.5.0 to before 5.5.16; 6.0 to before 6.0 RC25.5.16, 6.0 RC2Patch availableCNA
  • SimpleHelp VendorSimpleHelp Affected 5.5.0 to before 5.5.16; 6.0 to before 6.0 RC2 Fixed in 5.5.16, 6.0 RC2 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:simple-help:simplehelp:*:*:*:*:*:*:*:*before 5.5.16VulnerableSimpleHelp
cpe:2.3:a:simple-help:simplehelp:6.0:pre-release:*:*:*:*:*:*6.0 pre-releaseVulnerableSimpleHelp
  • cpe:2.3:a:simple-help:simplehelp:*:*:*:*:*:*:*:* Versions before 5.5.16 Vulnerable ·SimpleHelp
  • cpe:2.3:a:simple-help:simplehelp:6.0:pre-release:*:*:*:*:*:* Versions 6.0 pre-release Vulnerable ·SimpleHelp

Remediation

  • Fix · CNA SimpleHelp (SimpleHelp) Fixed in 5.5.16, 6.0 RC2

Timeline

  1. 2026-06-29 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2026-48558
  3. 2026-10-03 Alias added: GHSA-m93h-gjv2-fmq2
  4. 2026-10-07 CISA SSVC decision points changed
  5. 2026-10-25 EPSS moved to the 99th percentile and above

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2024-38047 SimpleHelp remote support software v5.5.7 and before has a vulnerability that allows… KEVCVSS 3.1CRITICAL 9.9
  • TI-2024-38048 SimpleHelp remote support software v5.5.7 and before is vulnerable to multiple path… KEVCVSS 3.1CRITICAL 9.1
  • TI-2024-38049 SimpleHelp remote support software v5.5.7 and before allows admin users to upload… KEVCVSS 3.1HIGH 7.2
  • TI-2025-24925 SimpleHelp Inclusion of functionality from untrusted control sphere CVSS 3.1HIGH 8.8
  • TI-2025-24926 SimpleHelp Cross Site Request Forgery CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences