EUVD-2026-65822
GHSA-vjc8-8qj2-32c5
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Network-delivered crafted page needs no privileges (PR:N) but requires the victim to open it (UI:R); sandbox escape justifies scope change (S:C) with full C/I/A impact.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionCVE.org
Use after free in FedCM in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
AnalysisAI
Sandbox-escaping remote code execution in Google Chrome's FedCM (Federated Credential Management) component affects all desktop builds prior to 152.0.7977.65. A remote attacker who lures a victim to a crafted HTML page can trigger a use-after-free (CWE-416) and execute arbitrary code outside the renderer sandbox, giving full control of the browser process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open an attacker-controlled crafted HTML page that exercises Chrome's FedCM code path (UI:R in the CVSS vector) - so user interaction via social engineering is the mandatory precondition and the primary limiting factor; there is no authentication requirement (PR:N) and no special server-side privilege. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals partially conflict and should be weighed together rather than read from the 9.6 alone. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers or compromises a web page and entices a target to open it (phishing link, malicious ad, or watering-hole). The page invokes FedCM in a way that triggers the use-after-free, and with heap grooming the attacker gains code execution outside the Chrome sandbox on the victim's machine. … |
| Remediation | Vendor-released patch: update Google Chrome to 152.0.7977.65 or later on all desktop platforms; this is delivered through Chrome's Stable channel per the Google release note at https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html, and the underlying bug is tracked at https://issues.chromium.org/issues/548340637. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, flag Chrome versions prior to 152.0.7977.65 in your endpoint inventory and prepare deployment through patch management systems. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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