{"id":"CVE-2026-87591","title":"Incorrect authorization in Extensions in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass system access restrictions via a crafted Chrome extension","summary":"Incorrect authorization in Extensions in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass system access restrictions via a crafted Chrome extension. (Chromium security severity: Medium)","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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":"2026-09-11","sourceUpdated":"2026-09-11T14:14:17.223","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87591","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/543938457","label":"chrome-cve-admin@google.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T18:43:57.663966Z"},"epss":0.00242,"epssPercentile":0.15684,"ingestedAt":"2026-09-09T01:17:17.507Z","slug":"CVE-2026-87591","body":"## Overview\n\nIncorrect authorization in Extensions in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass system access restrictions via a crafted Chrome extension. (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`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":202493,"id":"CVE-2026-87591","ts":1789400085642,"field":"cvss","old":null,"new":"6.5"},{"seq":202492,"id":"CVE-2026-87591","ts":1789400085642,"field":"severity","old":"none","new":"medium"},{"seq":201220,"id":"CVE-2026-87591","ts":1789397620354,"field":"cvss","old":"6.5","new":null},{"seq":201219,"id":"CVE-2026-87591","ts":1789397620354,"field":"severity","old":"medium","new":"none"},{"seq":199913,"id":"CVE-2026-87591","ts":1789395578299,"field":"cvss","old":null,"new":"6.5"},{"seq":199912,"id":"CVE-2026-87591","ts":1789395578299,"field":"severity","old":"none","new":"medium"},{"seq":199154,"id":"CVE-2026-87591","ts":1789392260417,"field":"cvss","old":"6.5","new":null},{"seq":199153,"id":"CVE-2026-87591","ts":1789392260417,"field":"severity","old":"medium","new":"none"},{"seq":197487,"id":"CVE-2026-87591","ts":1789384296945,"field":"cvss","old":null,"new":"6.5"},{"seq":197486,"id":"CVE-2026-87591","ts":1789384296945,"field":"severity","old":"none","new":"medium"},{"seq":196761,"id":"CVE-2026-87591","ts":1789383775064,"field":"cvss","old":"6.5","new":null},{"seq":196760,"id":"CVE-2026-87591","ts":1789383775064,"field":"severity","old":"medium","new":"none"},{"seq":195665,"id":"CVE-2026-87591","ts":1789380578329,"field":"cvss","old":null,"new":"6.5"},{"seq":195664,"id":"CVE-2026-87591","ts":1789380578329,"field":"severity","old":"none","new":"medium"},{"seq":194616,"id":"CVE-2026-87591","ts":1789378789565,"field":"cvss","old":"6.5","new":null},{"seq":194615,"id":"CVE-2026-87591","ts":1789378789565,"field":"severity","old":"medium","new":"none"},{"seq":193403,"id":"CVE-2026-87591","ts":1789376520999,"field":"cvss","old":null,"new":"6.5"},{"seq":193402,"id":"CVE-2026-87591","ts":1789376520999,"field":"severity","old":"none","new":"medium"},{"seq":192190,"id":"CVE-2026-87591","ts":1789373639375,"field":"cvss","old":"6.5","new":null},{"seq":192189,"id":"CVE-2026-87591","ts":1789373639375,"field":"severity","old":"medium","new":"none"},{"seq":190975,"id":"CVE-2026-87591","ts":1789369487976,"field":"cvss","old":null,"new":"6.5"},{"seq":190974,"id":"CVE-2026-87591","ts":1789369487976,"field":"severity","old":"none","new":"medium"},{"seq":189762,"id":"CVE-2026-87591","ts":1789368460946,"field":"cvss","old":"6.5","new":null},{"seq":189761,"id":"CVE-2026-87591","ts":1789368460946,"field":"severity","old":"medium","new":"none"},{"seq":188545,"id":"CVE-2026-87591","ts":1789365236909,"field":"cvss","old":null,"new":"6.5"},{"seq":188544,"id":"CVE-2026-87591","ts":1789365236909,"field":"severity","old":"none","new":"medium"},{"seq":187332,"id":"CVE-2026-87591","ts":1789363480283,"field":"cvss","old":"6.5","new":null},{"seq":187331,"id":"CVE-2026-87591","ts":1789363480283,"field":"severity","old":"medium","new":"none"},{"seq":186118,"id":"CVE-2026-87591","ts":1789361235579,"field":"cvss","old":null,"new":"6.5"},{"seq":186117,"id":"CVE-2026-87591","ts":1789361235579,"field":"severity","old":"none","new":"medium"},{"seq":184905,"id":"CVE-2026-87591","ts":1789358377357,"field":"cvss","old":"6.5","new":null},{"seq":184904,"id":"CVE-2026-87591","ts":1789358377357,"field":"severity","old":"medium","new":"none"},{"seq":183154,"id":"CVE-2026-87591","ts":1789354323436,"field":"cvss","old":null,"new":"6.5"},{"seq":183153,"id":"CVE-2026-87591","ts":1789354323436,"field":"severity","old":"none","new":"medium"},{"seq":181947,"id":"CVE-2026-87591","ts":1789353335261,"field":"cvss","old":"6.5","new":null},{"seq":181946,"id":"CVE-2026-87591","ts":1789353335261,"field":"severity","old":"medium","new":"none"},{"seq":180740,"id":"CVE-2026-87591","ts":1789350290906,"field":"cvss","old":null,"new":"6.5"},{"seq":180739,"id":"CVE-2026-87591","ts":1789350290906,"field":"severity","old":"none","new":"medium"},{"seq":179533,"id":"CVE-2026-87591","ts":1789348308583,"field":"cvss","old":"6.5","new":null},{"seq":179532,"id":"CVE-2026-87591","ts":1789348308583,"field":"severity","old":"medium","new":"none"},{"seq":178326,"id":"CVE-2026-87591","ts":1789346377909,"field":"cvss","old":null,"new":"6.5"},{"seq":178325,"id":"CVE-2026-87591","ts":1789346377909,"field":"severity","old":"none","new":"medium"},{"seq":177119,"id":"CVE-2026-87591","ts":1789343188540,"field":"cvss","old":"6.5","new":null},{"seq":177118,"id":"CVE-2026-87591","ts":1789343188540,"field":"severity","old":"medium","new":"none"},{"seq":175236,"id":"CVE-2026-87591","ts":1789334884578,"field":"cvss","old":null,"new":"6.5"},{"seq":175235,"id":"CVE-2026-87591","ts":1789334884578,"field":"severity","old":"none","new":"medium"},{"seq":174031,"id":"CVE-2026-87591","ts":1789333703681,"field":"cvss","old":"6.5","new":null},{"seq":174030,"id":"CVE-2026-87591","ts":1789333703681,"field":"severity","old":"medium","new":"none"},{"seq":172845,"id":"CVE-2026-87591","ts":1789331096909,"field":"cvss","old":null,"new":"6.5"},{"seq":172844,"id":"CVE-2026-87591","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