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CVE-2026-48558

CRITICAL
10.0
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-48558
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-05-21 18:34 UTC
Published
2026-06-12 17:07 UTC
Last updated
2026-06-13 03:56 UTC
Primary CWE
CWE-347
Improper Verification of Cryptographic Signature
Vendor / Product
SimpleHelp / SimpleHelp
Sources
cve.org  ·  NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
SimpleHelp SimpleHelp — 5.5.0 < 5.5.16, 6.0 < 6.0 RC2
Weakness (CWE)
CWESourceDescription
CWE-347 cna Improper Verification of Cryptographic Signature
CVSS scores (2)
ScoreSeverityVersionSourceVector
10.0 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.5 CRITICAL 4.0 cna 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
References (3)
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