EUVD-2026-66002
GHSA-h3h3-g7fm-v4rf
Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Site isolation bypass inherently affects a separate security scope (S:C); renderer prerequisite and crafted page delivery justify AC:H and UI:R; no integrity or availability impact observed.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
Lifecycle Timeline
4DescriptionCVE.org
Improper input validation in DevTools 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 HTML page. (Chromium security severity: Medium)
AnalysisAI
Site isolation bypass in Google Chrome DevTools (versions prior to 152.0.7977.65) enables cross-origin data theft as a second-stage exploit following renderer process compromise. An attacker who has already gained control of a Chrome renderer - itself requiring exploitation of a separate vulnerability - can serve a crafted HTML page exploiting improper input validation in DevTools to breach the browser's inter-site boundary and read data from other open origins. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two concrete prerequisites that substantially limit realistic attack surface: first, the attacker must have already compromised the Chrome renderer process via a separate, independent vulnerability - this is the primary gate. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 3.1 score of 3.1 (Low) reflects the constrained attack prerequisites: high complexity (AC:H) encoding the renderer-compromise prerequisite, required user interaction (UI:R), and limited confidentiality impact (C:L) with no integrity or availability 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 | Update Google Chrome to version 152.0.7977.65 or later via Chrome's built-in auto-update mechanism or by downloading directly from the stable channel advisory at 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-20 – Improper Input Validation
View allSame technique Authentication Bypass
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External POC / Exploit Code
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