{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-78953", "assignerOrgId": "ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28", "state": "PUBLISHED", "assignerShortName": "Chrome", "dateReserved": "2026-08-25T06:05:01.393Z", "datePublished": "2026-08-25T20:10:31.385Z", "dateUpdated": "2026-08-27T19:06:24.375Z"}, "containers": {"cna": {"affected": [{"vendor": "Google", "product": "Chrome", "versions": [{"version": "152.0.7977.65", "status": "affected", "lessThan": "152.0.7977.65", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Missing authorization in SiteIsolation in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (Chromium security severity: Medium)"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Missing authorization", "cweId": "CWE-862"}]}], "providerMetadata": {"orgId": "ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28", "shortName": "Chrome", "dateUpdated": "2026-08-25T20:10:31.385Z"}, "references": [{"url": "https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html"}, {"url": "https://issues.chromium.org/issues/516665605"}]}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.1, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-08-27T19:06:19.290605Z", "id": "CVE-2026-78953", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-27T19:06:24.375Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "Chrome", "vendor": "Google", "versions": [{"lessThan": "152.0.7977.65", "status": "affected", "version": "152.0.7977.65", "versionType": "custom"}]}], "source": "chrome-cve-admin@google.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "matchCriteriaId": "6041567D-8CD6-41F0-B2A8-68B03ECD32BC", "versionEndExcluding": "152.0.7977.65", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing authorization in SiteIsolation in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (Chromium security severity: Medium)"}], "id": "CVE-2026-78953", "lastModified": "2026-08-28T17:31:33.877", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-78953", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-27T19:06:19.290605Z", "version": "2.0.3"}}]}, "published": "2026-08-25T21:17:51.303", "references": [{"source": "chrome-cve-admin@google.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html"}, {"source": "chrome-cve-admin@google.com", "tags": ["Permissions Required"], "url": "https://issues.chromium.org/issues/516665605"}], "sourceIdentifier": "chrome-cve-admin@google.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "chrome-cve-admin@google.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[152.0.7977.65,152.0.7977.65)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Chrome", "source": "cna", "vendor": "Google"}, "product": "chrome", "vendor": "google"}], "created": "2026-08-25T22:15:04.104151+00:00", "title": "Site Isolation Bypass via Crafted PDF in Google Chrome", "updated": "2026-08-28T18:30:08.325372+00:00", "vendors": ["google", "google$PRODUCT$chrome"]}