{"id":"CVE-2026-85046","published":"2026-09-03T20:17:24Z","modified":"2026-09-21T13:17:10Z","title":"Google Chromium V8 Type Confusion Vulnerability","vendor":"Google","product":"Chromium V8","tier":"core","eol":null,"description":{"text":"Type confusion in V8 in Google Chrome prior to 152.0.7977.82 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is a type confusion vulnerability in the V8 JavaScript engine component of Google Chromium. An attacker who can get a victim to load a crafted HTML page can execute arbitrary code inside the browser sandbox, requiring only that the victim visits the page (user interaction) with no authentication or special configuration needed.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T08:31:51Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.01806,"percentile":0.78543,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-09-04","dueDate":"2026-09-18","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://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_01882797386.html ; 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-2026-85046","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-09-03","exploitedFirstSeen":"2026-09-03","ransomware":false,"evidence":[{"url":"https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_01882797386.html","date":"2026-09-03"},{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2026-09-03"},{"url":"https://euvd.enisa.europa.eu/enisa/EUVD-2026-70702","date":"2026-09-03"},{"url":"https://previdian.com/CVE-2026-85046","date":"2026-09-04"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-09-04"},{"url":"https://krypt3ia.wordpress.com/2026/09/08/weekly-all-source-cyber-warfare-intelligence-brief-september-8-2026/","date":"2026-09-08"},{"url":"https://www.volexity.com/blog/2026/09/09/mind-the-patch-gap-multiple-chinese-threat-actors-chain-0-day-exploits-in-chrome-windows/","date":"2026-09-09"},{"url":"https://www.proofpoint.com/us/blog/threat-insight/once-bluemoon-multiple-state-aligned-threat-actors-rapidly-adopt-novel-exploit","date":"2026-09-14"},{"url":"https://www.volexity.com/blog/2026/09/21/mind-the-patch-gap-part-2-fake-websites-used-to-deploy-chrome-windows-0-day-exploits/","date":"2026-09-21"}],"evidenceTotal":9,"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":"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":"PyPI Becomes a Distribution Channel for Crimeware: The Case of 'saeka,' a Carding Automation Tool.","url":"https://otx.alienvault.com/pulse/6ad7cd3ea852b96a1ec71460","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"}],"provenance":"machine"},"cwes":[{"id":"CWE-843","name":"Access of Resource Using Incompatible Type"}],"references":[{"url":"https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_01882797386.html","tags":["Release Notes","Vendor Advisory"]},{"url":"https://issues.chromium.org/issues/542403045","tags":["Permissions Required"]},{"url":"https://github.com/Serotav/Writeups/blob/77556c57999805fa7815a114da51d91cf24fbea9/v8/When_Sorting_Leads_To_Confusion.md","tags":["Exploit","Third Party Advisory"]},{"url":"https://github.com/v8/v8/commit/e0562d87ad9c17042b581582c99237d798572e67","tags":["Patch"]},{"url":"https://news.ycombinator.com/item?id=49570669","tags":["Issue Tracking","Third Party Advisory"]},{"url":"https://serotav.github.io/Writeups/v8/when-sorting-leads-to-confusion/","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85046","tags":["US Government Resource"]}],"techniques":[{"id":"T1189","name":"Drive-by Compromise","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Malicious webpage delivers exploit to browser","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page","start":61,"end":155}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1203","name":"Exploitation for Client Execution","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Exploit executes within browser client application","mappingType":"primary_impact","evidence":[{"from":"description","quote":"Type confusion in V8 in Google Chrome","start":0,"end":37}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-70702","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-70702","exploited":true,"exploitedSince":"2026-09-04","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":6,"skipped":1,"earliest":"2026-09-04","earliestUrl":"https://github.com/HORKimhab/CVE-2026-85046","repos":[{"name":"atiilla/CVE-2026-85046","url":"https://github.com/atiilla/CVE-2026-85046","stars":8,"created":"2026-09-08"},{"name":"adriyansyah-mf/cve-2026-85046-poc","url":"https://github.com/adriyansyah-mf/cve-2026-85046-poc","stars":6,"created":"2026-09-05"},{"name":"HORKimhab/CVE-2026-85046","url":"https://github.com/HORKimhab/CVE-2026-85046","stars":1,"created":"2026-09-04"},{"name":"SneakyNachos/CVE-2026-85046-who-put-the-silverback-guerilla-in-the-wasm","url":"https://github.com/SneakyNachos/CVE-2026-85046-who-put-the-silverback-guerilla-in-the-wasm","stars":1,"created":"2026-09-08"},{"name":"ubitquity/CVE-2026-85046-Patch-confusion-zero-day-vulnerability-in-Google-Chrome-s-V8-engine","url":"https://github.com/ubitquity/CVE-2026-85046-Patch-confusion-zero-day-vulnerability-in-Google-Chrome-s-V8-engine","stars":0,"created":"2026-09-04"}]},"first":{"date":"2026-09-04","source":"PoC-in-GitHub","url":"https://github.com/HORKimhab/CVE-2026-85046"},"provenance":"source"},"exploitRefs":["https://github.com/Serotav/Writeups/blob/77556c57999805fa7815a114da51d91cf24fbea9/v8/When_Sorting_Leads_To_Confusion.md","https://serotav.github.io/Writeups/v8/when-sorting-leads-to-confusion/"],"flow":[{"stage":"exploitation","techniques":["T1189"],"provenance":"ai"},{"stage":"primary","techniques":["T1203"],"provenance":"ai"}],"timeline":[{"date":"2026-09-03","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85046","provenance":"source"},{"date":"2026-09-03","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_01882797386.html","provenance":"source"},{"date":"2026-09-04","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/HORKimhab/CVE-2026-85046","provenance":"source"},{"date":"2026-09-04","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-09-04","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-70702","provenance":"source"}],"speed":{"daysToPublicExploit":1,"firstExploitFrom":"PoC-in-GitHub","daysToKev":1},"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":10.0,"detail":"added 58 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":15.71,"detail":"percentile 0.7854"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"2 NVD references tagged Exploit; 6 PoC-in-GitHub repos"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.16,"detail":"base score 8.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-google-chrome-cwe-843"}}