{"id":"CVE-2026-87505","title":"Incorrect authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file","summary":"Incorrect authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (Chromium security severity: Medium)","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-863"],"vendor":"google","product":"chrome","affected":["chrome < 153.0.8010.36"],"patched":["chrome 153.0.8010.36"],"published":"2026-09-09","updated":"2026-09-10","sourceUpdated":"2026-09-10T19:23:56.697","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87505","references":[{"url":"https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html","label":"chrome-cve-admin@google.com"},{"url":"https://issues.chromium.org/issues/517597701","label":"chrome-cve-admin@google.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87505.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-87505"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87505"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T14:10:12.211105Z"},"epss":0.00272,"epssPercentile":0.17515,"scores":{"nvd":8.1,"vendor":4.6,"adp":8.1},"ingestedAt":"2026-09-09T01:17:17.508Z","slug":"CVE-2026-87505","body":"## Overview\n\nIncorrect authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (Chromium security severity: Medium)\n\n## Affected\n\n- `chrome < 153.0.8010.36`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `chrome 153.0.8010.36`\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87505.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":202320,"id":"CVE-2026-87505","ts":1789400065479,"field":"cvss","old":null,"new":"8.1"},{"seq":202319,"id":"CVE-2026-87505","ts":1789400065479,"field":"severity","old":"none","new":"high"},{"seq":201047,"id":"CVE-2026-87505","ts":1789397619678,"field":"cvss","old":"8.1","new":null},{"seq":201046,"id":"CVE-2026-87505","ts":1789397619678,"field":"severity","old":"high","new":"none"},{"seq":199740,"id":"CVE-2026-87505","ts":1789395571514,"field":"cvss","old":null,"new":"8.1"},{"seq":199739,"id":"CVE-2026-87505","ts":1789395571514,"field":"severity","old":"none","new":"high"},{"seq":198981,"id":"CVE-2026-87505","ts":1789392259816,"field":"cvss","old":"8.1","new":null},{"seq":198980,"id":"CVE-2026-87505","ts":1789392259816,"field":"severity","old":"high","new":"none"},{"seq":197314,"id":"CVE-2026-87505","ts":1789384296374,"field":"cvss","old":null,"new":"8.1"},{"seq":197313,"id":"CVE-2026-87505","ts":1789384296374,"field":"severity","old":"none","new":"high"},{"seq":196588,"id":"CVE-2026-87505","ts":1789383763634,"field":"cvss","old":"8.1","new":null},{"seq":196587,"id":"CVE-2026-87505","ts":1789383763634,"field":"severity","old":"high","new":"none"},{"seq":195492,"id":"CVE-2026-87505","ts":1789380577229,"field":"cvss","old":null,"new":"8.1"},{"seq":195491,"id":"CVE-2026-87505","ts":1789380577229,"field":"severity","old":"none","new":"high"},{"seq":194443,"id":"CVE-2026-87505","ts":1789378788935,"field":"cvss","old":"8.1","new":null},{"seq":194442,"id":"CVE-2026-87505","ts":1789378788935,"field":"severity","old":"high","new":"none"},{"seq":193230,"id":"CVE-2026-87505","ts":1789376520358,"field":"cvss","old":null,"new":"8.1"},{"seq":193229,"id":"CVE-2026-87505","ts":1789376520358,"field":"severity","old":"none","new":"high"},{"seq":192017,"id":"CVE-2026-87505","ts":1789373638727,"field":"cvss","old":"8.1","new":null},{"seq":192016,"id":"CVE-2026-87505","ts":1789373638727,"field":"severity","old":"high","new":"none"},{"seq":190802,"id":"CVE-2026-87505","ts":1789369487193,"field":"cvss","old":null,"new":"8.1"},{"seq":190801,"id":"CVE-2026-87505","ts":1789369487193,"field":"severity","old":"none","new":"high"},{"seq":189589,"id":"CVE-2026-87505","ts":1789368460299,"field":"cvss","old":"8.1","new":null},{"seq":189588,"id":"CVE-2026-87505","ts":1789368460299,"field":"severity","old":"high","new":"none"},{"seq":188372,"id":"CVE-2026-87505","ts":1789365236309,"field":"cvss","old":null,"new":"8.1"},{"seq":188371,"id":"CVE-2026-87505","ts":1789365236309,"field":"severity","old":"none","new":"high"},{"seq":187159,"id":"CVE-2026-87505","ts":1789363479685,"field":"cvss","old":"8.1","new":null},{"seq":187158,"id":"CVE-2026-87505","ts":1789363479685,"field":"severity","old":"high","new":"none"},{"seq":185945,"id":"CVE-2026-87505","ts":1789361234934,"field":"cvss","old":null,"new":"8.1"},{"seq":185944,"id":"CVE-2026-87505","ts":1789361234934,"field":"severity","old":"none","new":"high"},{"seq":184732,"id":"CVE-2026-87505","ts":1789358376648,"field":"cvss","old":"8.1","new":null},{"seq":184731,"id":"CVE-2026-87505","ts":1789358376648,"field":"severity","old":"high","new":"none"},{"seq":182981,"id":"CVE-2026-87505","ts":1789354322753,"field":"cvss","old":null,"new":"8.1"},{"seq":182980,"id":"CVE-2026-87505","ts":1789354322753,"field":"severity","old":"none","new":"high"},{"seq":181774,"id":"CVE-2026-87505","ts":1789353333954,"field":"cvss","old":"8.1","new":null},{"seq":181773,"id":"CVE-2026-87505","ts":1789353333954,"field":"severity","old":"high","new":"none"},{"seq":180567,"id":"CVE-2026-87505","ts":1789350290278,"field":"cvss","old":null,"new":"8.1"},{"seq":180566,"id":"CVE-2026-87505","ts":1789350290278,"field":"severity","old":"none","new":"high"},{"seq":179360,"id":"CVE-2026-87505","ts":1789348306967,"field":"cvss","old":"8.1","new":null},{"seq":179359,"id":"CVE-2026-87505","ts":1789348306967,"field":"severity","old":"high","new":"none"},{"seq":178153,"id":"CVE-2026-87505","ts":1789346377315,"field":"cvss","old":null,"new":"8.1"},{"seq":178152,"id":"CVE-2026-87505","ts":1789346377315,"field":"severity","old":"none","new":"high"},{"seq":176946,"id":"CVE-2026-87505","ts":1789343187443,"field":"cvss","old":"8.1","new":null},{"seq":176945,"id":"CVE-2026-87505","ts":1789343187443,"field":"severity","old":"high","new":"none"},{"seq":175063,"id":"CVE-2026-87505","ts":1789334883903,"field":"cvss","old":null,"new":"8.1"},{"seq":175062,"id":"CVE-2026-87505","ts":1789334883903,"field":"severity","old":"none","new":"high"},{"seq":173858,"id":"CVE-2026-87505","ts":1789333703071,"field":"cvss","old":"8.1","new":null},{"seq":173857,"id":"CVE-2026-87505","ts":1789333703071,"field":"severity","old":"high","new":"none"},{"seq":172672,"id":"CVE-2026-87505","ts":1789331096301,"field":"cvss","old":null,"new":"8.1"},{"seq":17267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