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CVE-2026-48558

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0a5398acb7c3abdd4a6280a485e5bf29b188486ffd2b76c36c02f41466f07a60
Known exploited
CISA KEV
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.5,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityIm…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"SimpleHelp","vendor":"SimpleHelp","versions":[{"lessThan":"5.5.16","status":"affected","version":"5.5.0","versionType":"semver"},{"lessThan":"6.0 RC2","status":"affected","version":"6.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.5,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityIm…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-347","description":"Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-347"],"dateAdded":"2026-06-29","dueDate":"2026-07-02","knownRansomwareCampaignUse":"Unknown","notes":"https://simple-help.com/security/simplehelp-security-update-2026-05 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-48558","product":"SimpleHelp","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuri…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:0f4484ccd12ea012143e602b0baded4c9fe1971a052b205420e26fc496fe285d · sha256:16acee8334e59e44… · /vulnerabilities/27
    Open source location →
{"cwes":["CWE-347"],"dateAdded":"2026-06-29","dueDate":"2026-07-02","knownRansomwareCampaignUse":"Unknown","notes":"https://simple-help.com/security/simplehelp-security-update-2026-05 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-48558","product":"SimpleHelp","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuri…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:5b79853dfe645e1cc4d3c8965c9681d6ed017b2104a1826c98c4c5baf416e50d · sha256:635dff916c4092c0… · /vulnerabilities/30
    Open source location →

Source references

5 source assertions
{"tags":["third-party-advisory"],"url":"https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/adp/0/references/0
{"tags":["technical-description","exploit"],"url":"https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/references/0
{"tags":["release-notes"],"url":"https://simple-help.com/release-news"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/references/2
{"tags":["vendor-advisory"],"url":"https://simple-help.com/security/simplehelp-security-update-2026-05"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/cna/references/1
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48558"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:266d47fa302e5353f935ad28d3d30622d00d9ef2ea1df23b94fc4bf43bed7227 · sha256:b24d7f78d1a9a5ff… · /containers/adp/0/references/1

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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