{"id":"CVE-2026-78953","title":"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","summary":"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)","severity":"low","cvss":3.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","cwe":["CWE-862"],"vendor":"google","product":"chrome","affected":["chrome < 152.0.7977.65"],"patched":["chrome 152.0.7977.65"],"published":"2026-08-25","updated":"2026-09-19","sourceUpdated":"2026-09-19T14:16:59.297","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78953","references":[{"url":"https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html","label":"chrome-cve-admin@google.com"},{"url":"https://issues.chromium.org/issues/516665605","label":"chrome-cve-admin@google.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-27T19:06:19.290605Z"},"epss":0.00296,"epssPercentile":0.22486,"ingestedAt":"2026-09-17T19:26:25.292Z","slug":"CVE-2026-78953","body":"## Overview\n\nMissing 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)\n\n## Affected\n\n- `chrome < 152.0.7977.65`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `chrome 152.0.7977.65`","depth":"sunlit","depthScore":17,"depthScoreParts":{"impact":17.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":207680,"id":"CVE-2026-78953","ts":1789826663507,"field":"cvss","old":null,"new":"3.1"},{"seq":207679,"id":"CVE-2026-78953","ts":1789826663507,"field":"severity","old":"none","new":"low"}]}