EUVD-2026-74409
GHSA-85xp-5rxj-4fh2
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Site isolation bypass inherently crosses security domains (S:C); incidental confidentiality exposure expected alongside confirmed integrity impact (I:H).
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
Lifecycle Timeline
6DescriptionCVE.org
Incorrect authorization in Isolated in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Site isolation bypass in Google Chrome prior to 153.0.8010.36 allows a remote attacker to subvert cross-origin integrity guarantees by directing a victim to visit a crafted HTML page, exploiting incorrect authorization checks (CWE-863) in Chrome's Isolated component. The CVSS score rates integrity impact as High with no privileges required, but user interaction is necessary and confidentiality impact is assessed as none. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must actively navigate to or be redirected to an attacker-controlled HTML page (UI:R per CVSS), meaning passive network-level exploitation is not possible without social engineering or a redirect chain. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) reflects a network-reachable, low-complexity flaw requiring no privileges but demanding one click from the victim. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Google Chrome to version 153.0.8010.36 or later, which contains the vendor-released patch addressing the incorrect authorization in the Isolated component. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-863 – Incorrect Authorization
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External POC / Exploit Code
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