CVE Details
CVE-2026-48558
SimpleHelp Authentication Bypass Vulnerability
Published: 2026-06-29
CVSS: 9.5 CRITICAL
Product: SimpleHelp SimpleHelp
Due Date: 2026-07-02
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.
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FIRST EPSS
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Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-48558 |
| cveMetadata > | assignerOrgId | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | VulnCheck |
| cveMetadata > | dateReserved | 2026-05-21T18:34:46.418Z |
| cveMetadata > | datePublished | 2026-06-12T17:07:05.453Z |
| cveMetadata > | dateUpdated | 2026-06-30T03:55:20.638Z |
| containers > | cna > providerMetadata > orgId | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
| containers > | cna > providerMetadata > shortName | VulnCheck |
| containers > | cna > providerMetadata > dateUpdated | 2026-06-12T17:07:05.453Z |
| containers > | cna > title | SimpleHelp Authentication Bypass via Missing OIDC JWT Signature Verification |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | 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. |
| containers > | cna > datePublic | 2026-05-26T00:00:00.000Z |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-347 |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | Improper Verification of Cryptographic Signature |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > affected > 0 > defaultStatus | affected |
| containers > | cna > affected > 0 > vendor | SimpleHelp |
| containers > | cna > affected > 0 > product | SimpleHelp |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 0 > versions > 0 > version | 5.5.0 |
| containers > | cna > affected > 0 > versions > 0 > versionType | semver |
| containers > | cna > affected > 0 > versions > 0 > lessThan | 5.5.16 |
| containers > | cna > affected > 0 > versions > 1 > status | affected |
| containers > | cna > affected > 0 > versions > 1 > version | 6.0 |
| containers > | cna > affected > 0 > versions > 1 > versionType | custom |
| containers > | cna > affected > 0 > versions > 1 > lessThan | 6.0 RC2 |
| containers > | cna > metrics > 0 > format | CVSS |
| containers > | cna > metrics > 0 > scenarios > 0 > lang | en |
| containers > | cna > metrics > 0 > scenarios > 0 > value | GENERAL |
| containers > | cna > metrics > 0 > cvssV4_0 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV4_0 > attackComplexity | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > attackRequirements | PRESENT |
| containers > | cna > metrics > 0 > cvssV4_0 > privilegesRequired | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > userInteraction | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnConfidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > subConfidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnIntegrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > subIntegrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnAvailabilityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > subAvailabilityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > exploitMaturity | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > Safety | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > Automatable | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > Recovery | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > valueDensity | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnerabilityResponseEffort | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > providerUrgency | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > version | 4.0 |
| containers > | cna > metrics > 0 > cvssV4_0 > baseSeverity | CRITICAL |
| containers > | cna > metrics > 0 > cvssV4_0 > baseScore | 9.5 |
| containers > | cna > metrics > 0 > cvssV4_0 > vectorString | 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 |
| containers > | cna > metrics > 1 > format | CVSS |
| containers > | cna > metrics > 1 > scenarios > 0 > lang | en |
| containers > | cna > metrics > 1 > scenarios > 0 > value | GENERAL |
| containers > | cna > metrics > 1 > cvssV3_1 > attackVector | NETWORK |
| containers > | cna > metrics > 1 > cvssV3_1 > attackComplexity | LOW |
| containers > | cna > metrics > 1 > cvssV3_1 > privilegesRequired | NONE |
| containers > | cna > metrics > 1 > cvssV3_1 > userInteraction | NONE |
| containers > | cna > metrics > 1 > cvssV3_1 > scope | CHANGED |
| containers > | cna > metrics > 1 > cvssV3_1 > confidentialityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV3_1 > integrityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV3_1 > availabilityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV3_1 > version | 3.1 |
| containers > | cna > metrics > 1 > cvssV3_1 > baseSeverity | CRITICAL |
| containers > | cna > metrics > 1 > cvssV3_1 > baseScore | 10 |
| containers > | cna > metrics > 1 > cvssV3_1 > vectorString | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| containers > | cna > references > 0 > url | https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/ |
| containers > | cna > references > 0 > tags > 0 | technical-description |
| containers > | cna > references > 0 > tags > 1 | exploit |
| containers > | cna > references > 1 > url | https://simple-help.com/security/simplehelp-security-update-2026-05 |
| containers > | cna > references > 1 > tags > 0 | vendor-advisory |
| containers > | cna > references > 2 > url | https://simple-help.com/release-news |
| containers > | cna > references > 2 > tags > 0 | release-notes |
| containers > | cna > credits > 0 > lang | en |
| containers > | cna > credits > 0 > value | Zach Hanley (@hacks_zach) of Horizon3.ai |
| containers > | cna > credits > 0 > type | finder |
| containers > | cna > source > discovery | UNKNOWN |
| containers > | cna > x_generator > engine | vulncheck |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-06-12T00:00:00+00:00 |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | yes |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-48558 |
| containers > | adp > 0 > references > 0 > url | https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/ |
| containers > | adp > 0 > references > 0 > tags > 0 | third-party-advisory |
| containers > | adp > 0 > references > 1 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48558 |
| containers > | adp > 0 > references > 1 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-06-30T03:55:20.638Z |