EUVD-2026-74388
GHSA-v3g2-fh7f-m49v
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
AC:H reflects the mandatory renderer-compromise prerequisite; S:C reflects that site isolation bypass affects other origins outside the compromised renderer.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
Lifecycle Timeline
6DescriptionCVE.org
Incorrect authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (Chromium security severity: Medium)
AnalysisAI
Site isolation bypass in Google Chrome's FileSystem component allows a remote attacker who has already achieved renderer process compromise to escape cross-origin boundaries via a crafted PDF file. Affected versions are all Chrome releases prior to 153.0.8010.36 on desktop platforms. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two sequential conditions: (1) the attacker must have already compromised the Chrome renderer process through a separate, independent exploit - this is an explicit prerequisite stated in the description, not a minor qualifier; (2) the victim must open or be delivered a crafted PDF file within the compromised Chrome session (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N = 8.1) is likely overstated for real-world prioritization. … 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 153.0.8010.36 or later via the browser's built-in updater (Settings → Help → About Google Chrome) or via enterprise deployment tools. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, communicate the availability of Chrome 153.0.8010.36 to all end users and device administrators. …
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Same weakness CWE-863 – Incorrect Authorization
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External POC / Exploit Code
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