{"id":"CVE-2026-96655","published":"2026-09-23T17:17:23Z","modified":"2026-10-21T13:09:29Z","title":"Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability","vendor":"Plex","product":"Media Server","tier":"core","eol":null,"description":{"text":"Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.","provenance":"source","from":"NVD"},"summary":{"text":"The Plex Media Server component of Plex's Media Server product contains a Server-Side Request Forgery flaw in the '/video/:/transcode/universal' path parameter, affecting releases before 1.43.3.10861. An attacker with a valid authenticated user account, reaching the server over the network with no user interaction required, can make the server request arbitrary internal or external addresses.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:15:27Z"},"cvss":{"score":4.3,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.01637,"percentile":0.7631,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-10-20","dueDate":"2026-11-03","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://forums.plex.tv/t/important-security-update-for-plex-media-server-v1-43-2-and-earlier/942319 ; ; 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-2026-96655","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-10-18","exploitedFirstSeen":"2026-10-18","ransomware":false,"evidence":[{"url":"https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html","date":"2026-10-18"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-10-20"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":{"pulseCount":11,"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":"Plex vulnerabilities being exploited in the wild to drop a cryptominer","url":"https://otx.alienvault.com/pulse/6ae28367e4148ac8133ccf7a","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":"Plex vulnerabilities being exploited in the wild to drop a cryptominer","url":"https://otx.alienvault.com/pulse/6ad5b2c95417d4d1ac959070","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"references":[{"url":"https://forums.plex.tv/t/plex-media-server/30447/711","tags":["Release Notes"]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json","tags":["Third Party Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-96655","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://zmain.info/blog/plex2shell","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96655","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: Exploits internet-facing media server endpoint","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows an authenticated user to request arbitrary internal or external addresses","start":38,"end":118}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1090","name":"Proxy","tactics":["command-and-control"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: SSRF proxies requests through server","mappingType":"primary_impact","evidence":[{"from":"description","quote":"request arbitrary internal or external addresses via the","start":70,"end":126}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-85369","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85369","exploited":true,"exploitedSince":"2026-10-20","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1090"],"provenance":"ai"}],"timeline":[{"date":"2026-09-23","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96655","provenance":"source"},{"date":"2026-10-18","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html","provenance":"source"},{"date":"2026-10-20","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-10-20","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85369","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":27},"priority":{"score":65.7,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":10.0,"detail":"added 13 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":15.26,"detail":"percentile 0.7631"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":2.45,"detail":"11 pulses"},{"name":"CVSS severity","points":3.01,"detail":"base score 4.3"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}