{"schema":"threatline.record/2","record":{"id":"CVE-2026-48558","aliases":[],"summary":"SimpleHelp Authentication Bypass Vulnerability","details":"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.","categories":["Applications & CMS"],"product":"SimpleHelp","vendor":"SimpleHelp ","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-48558","source_modified_at":"2026-10-07T19:26:16.974Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"SimpleHelp","vendor":"SimpleHelp","versions":[{"status":"affected","version":"5.5.0","versionType":"semver","lessThan":"5.5.16"},{"status":"affected","version":"6.0","versionType":"custom","lessThan":"6.0 RC2"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-48558","source_modified_at":"2026-10-07T19:26:16.974Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"SimpleHelp","ecosystem":null},"version":"5.5.16","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-48558","source_modified_at":"2026-10-07T19:26:16.974Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"SimpleHelp","ecosystem":null},"version":"6.0 RC2","basis":"first unaffected version stated in the CVE record"}],"cvss":9.5,"severity":"Critical","kev":{"listed":true,"date_added":"2026-06-29","due_date":"2026-07-02","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.05719,"percentile":0.93013,"score_date":"2026-10-23"},"published_at":"2026-06-12T17:07:05.453Z","modified_at":"2026-10-07T19:26:16.974Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-48558","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T19:26:16.974Z"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/simplehelp_oidc_auth_bypass_rce.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-06-12"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-48558.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-48558","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Metasploit","Nuclei","EPSS"],"references":[{"source":"CVE List","url":"https://simple-help.com/security/simplehelp-security-update-2026-05","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48558","source":"CISA KEV"},{"source":"CVE List","url":"https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/","tags":["technical-description","exploit"]},{"source":"CVE List","url":"https://simple-help.com/release-news","tags":["release-notes"]},{"source":"CVE List","url":"https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48558","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2026-06-30T03:55:22.397894Z"},"exploits":[{"source":"Metasploit","kind":"Exploit module","name":"SimpleHelp OIDC Authentication Bypass Remote Code Execution","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/simplehelp_oidc_auth_bypass_rce.rb","date":"2026-06-12","added":"2026-09-01","check":true},{"source":"Nuclei","kind":"Scanner template","name":"SimpleHelp <=5.5.15 - OIDC JWT Authentication Bypass","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-48558.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-07T19:26:16.974Z","content_hash":"a0610803b7c4d8839dc66ee1a733e30ce380337961b79ca4ef825c8f4eec0d53"}}