EUVD-2026-74534
GHSA-wr5p-rp9h-m83h
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
AC:H encodes the renderer-compromise prerequisite; S:C reflects sandbox escape; C/I/A:H reflects full host access post-escape.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
Lifecycle Timeline
5DescriptionCVE.org
Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Sandbox escape in Google Chrome's FileSystem component prior to 153.0.8010.36 stems from missing authorization checks (CWE-862), allowing arbitrary code execution outside the renderer sandbox. The attack is multi-stage: an attacker must first compromise the renderer process via a separate exploit, then serve a crafted HTML page using social engineering to trigger the authorization gap and escape the sandbox. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Two explicit prerequisites are required for exploitation: (1) the Chrome renderer process must already be compromised via a separate vulnerability - this CVE is a second-stage sandbox escape, not a standalone entry point; (2) the victim must be actively social-engineered into visiting a crafted HTML page (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.3 (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H) reflects full post-escape impact (C:H/I:H/A:H, S:C for sandbox breach) but is appropriately moderated by AC:H and UI:R - both encoding the real-world attack barriers. … 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 Chrome stable channel (see https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, issue communications to end-users and IT teams regarding the available patch and prioritize Chrome updates in your deployment queue. …
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Same weakness CWE-862 – Missing Authorization
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External POC / Exploit Code
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