EUVD-2026-65913
GHSA-37hg-6g4q-h66r
Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Site isolation bypass inherently crosses a security boundary (S:C); renderer pre-compromise and social engineering justify AC:H and UI:R; impact is confidentiality-only and low.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
Lifecycle Timeline
4DescriptionCVE.org
Missing authorization in Lighthouse in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Site isolation bypass in Google Chrome prior to 152.0.7977.65 exploits a missing authorization flaw (CWE-862) in the Lighthouse auditing component, allowing an attacker who has already achieved renderer process compromise to cross site isolation boundaries and access limited cross-origin data. The attack chain requires high complexity - a pre-compromised renderer plus active social engineering - making this a second-stage vulnerability in a chained exploit rather than an independently weaponizable flaw. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two simultaneous conditions that are both non-trivial to satisfy. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 3.1 (Low) with vector AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N reflects constrained real-world impact. … 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 to Google Chrome 152.0.7977.65 or later; this is the vendor-confirmed fix per the Chrome Stable Channel Update advisory at https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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