{"api_version":"1","generated_at":"2026-06-03T09:30:19+00:00","cve":"CVE-2026-9891","urls":{"html":"https://cve.report/CVE-2026-9891","api":"https://cve.report/api/cve/CVE-2026-9891.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-9891","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-9891"},"summary":{"title":"CVE-2026-9891","description":"Use after free in Extensions in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: Critical)","state":"PUBLISHED","assigner":"Chrome","published_at":"2026-05-28 23:16:47","updated_at":"2026-05-29 17:15:18"},"problem_types":["CWE-416","CWE-416 Use after free"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"9","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"9","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"references":[{"url":"https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html","name":"https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html","refsource":"chrome-cve-admin@google.com","tags":["Vendor Advisory","Release Notes"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://issues.chromium.org/issues/513508128","name":"https://issues.chromium.org/issues/513508128","refsource":"chrome-cve-admin@google.com","tags":["Permissions Required"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-9891","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9891","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Google","product":"Chrome","version":"affected 148.0.7778.216 148.0.7778.216 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"9891","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"google","cpe5":"chrome","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2026","cve_id":"9891","vulnerable":"0","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"9891","cve":"CVE-2026-9891","epss":"0.001180000","percentile":"0.303850000","score_date":"2026-06-02","updated_at":"2026-06-03 00:08:16"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-9891","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-05-29T14:52:41.581934Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-05-29T14:53:08.767Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"Chrome","vendor":"Google","versions":[{"lessThan":"148.0.7778.216","status":"affected","version":"148.0.7778.216","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"Use after free in Extensions in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: Critical)"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","description":"Use after free","lang":"en"}]}],"providerMetadata":{"dateUpdated":"2026-05-28T22:25:14.442Z","orgId":"ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28","shortName":"Chrome"},"references":[{"url":"https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html"},{"url":"https://issues.chromium.org/issues/513508128"}]}},"cveMetadata":{"assignerOrgId":"ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28","assignerShortName":"Chrome","cveId":"CVE-2026-9891","datePublished":"2026-05-28T22:25:14.442Z","dateReserved":"2026-05-28T17:24:44.688Z","dateUpdated":"2026-05-29T14:53:08.767Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-28 23:16:47","lastModifiedDate":"2026-05-29 17:15:18","problem_types":["CWE-416","CWE-416 Use after free"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":6}]},"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*","versionEndExcluding":"148.0.7778.216","matchCriteriaId":"E59192D9-BF13-4B43-B69F-869A6BF83955"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*","matchCriteriaId":"A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]},{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*","versionEndExcluding":"148.0.7778.215","matchCriteriaId":"875ACED4-0D6D-4BAA-8FAF-F13B5FEDF09A"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*","matchCriteriaId":"387021A0-AF36-463C-A605-32EA7DAC172E"},{"vulnerable":false,"criteria":"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*","matchCriteriaId":"703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"9891","Ordinal":"1","Title":"CVE-2026-9891","CVE":"CVE-2026-9891","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"9891","Ordinal":"1","NoteData":"Use after free in Extensions in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: Critical)","Type":"Description","Title":"CVE-2026-9891"}]}}}