{"id":"CVE-2026-48558","published":"2026-06-12T18:16:35Z","modified":"2026-10-07T20:17:12Z","title":"SimpleHelp Authentication Bypass Vulnerability","vendor":"SimpleHelp ","product":"SimpleHelp","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"SimpleHelp contains an authentication bypass flaw in its OIDC authentication flow, where identity tokens submitted during login are accepted without verifying their cryptographic signature. A remote, unauthenticated attacker can exploit this in a vulnerable OIDC configuration by submitting a forged token with arbitrary identity claims to obtain a fully authenticated technician session, with no user interaction required and possibly bypassing multi-factor authentication in some configurations.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:12:37Z"},"cvss":{"score":10.0,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.77659,"percentile":0.99563,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-06-29","dueDate":"2026-07-02","ransomware":false,"requiredAction":"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.","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","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-06-29","exploitedFirstSeen":"2026-06-29","ransomware":false,"evidence":[{"url":"https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/","date":"2026-06-29"},{"url":"https://previdian.com/CVE-2026-48558","date":"2026-06-29"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-06-29"},{"url":"https://www.recordedfuture.com/blog/june-2026-cve-landscape","date":"2026-07-10"},{"url":"https://cyble.com/reports/H1-2026-Global-Threat-Landscape-Report.pdf","date":"2026-07-27"},{"url":"https://blackpointcyber.com/blog/notes-from-the-chief-security-and-trust-officer-july-2026/","date":"2026-08-05"},{"url":"https://blackpointcyber.com/blog/threat-snapshot-djinn-stealer/","date":"2026-09-10"}],"evidenceTotal":7,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Threat Snapshot: Djinn Stealer","url":"https://otx.alienvault.com/pulse/6ae286f9d9e49f8f828b2545","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"}],"provenance":"machine"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"references":[{"url":"https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/","tags":["Third Party Advisory"]},{"url":"https://simple-help.com/release-news","tags":["Release Notes"]},{"url":"https://simple-help.com/security/simplehelp-security-update-2026-05","tags":["Patch","Vendor Advisory"]},{"url":"https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/","tags":["Technical Description","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48558","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Unauthenticated remote attack against public-facing login endpoint","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"a remote, unauthenticated attacker can submit a forged token","start":318,"end":378}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1078","name":"Valid Accounts","tactics":["initial-access","persistence","privilege-escalation","stealth"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Forged token yields valid authenticated technician session","mappingType":"primary_impact","evidence":[{"from":"description","quote":"obtain a fully authenticated technician session","start":419,"end":466}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-36509","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36509","exploited":true,"exploitedSince":"2026-06-29","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2026-07-02","earliestUrl":"https://github.com/J4ck3LSyN-Gen2/CVE-2026-48558","repos":[{"name":"J4ck3LSyN-Gen2/CVE-2026-48558","url":"https://github.com/J4ck3LSyN-Gen2/CVE-2026-48558","stars":8,"created":"2026-07-02"}]},"metasploit":[{"name":"SimpleHelp OIDC Authentication Bypass Remote Code Execution","module":"exploit/multi/http/simplehelp_oidc_auth_bypass_rce","type":"exploit","disclosureDate":"2026-06-12","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/simplehelp_oidc_auth_bypass_rce.rb"}],"nuclei":[{"id":"CVE-2026-48558","name":"SimpleHelp <=5.5.15 - OIDC JWT Authentication Bypass","severity":"critical","path":"http/cves/2026/CVE-2026-48558.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-48558.yaml"}],"first":{"date":"2026-06-12","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/simplehelp_oidc_auth_bypass_rce.rb"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1078"],"provenance":"ai"}],"timeline":[{"date":"2026-06-12","kind":"published","label":"Published 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exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36509","provenance":"source"}],"speed":{"daysToPublicExploit":0,"firstExploitFrom":"Metasploit","daysToKev":17},"priority":{"score":74.9,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":5.0,"detail":"added 124 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.91,"detail":"percentile 0.9956"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 PoC-in-GitHub repo; 1 Metasploit module; 1 nuclei template"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":7.0,"detail":"base score 10.0"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}