EUVD-2026-66060
GHSA-g24r-x22v-qjxp
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Crafted page delivered over network requires active user approval of a spoofed WebAuthn dialog; no attacker privileges needed; only authentication integrity is impacted, not confidentiality or availability.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Lifecycle Timeline
4DescriptionCVE.org
UI misrepresentation in Web Authentication (Passkeys & Security Keys) in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Low)
AnalysisAI
UI misrepresentation in Google Chrome's Web Authentication (WebAuthn) subsystem - covering both Passkeys and hardware Security Keys - prior to version 152.0.7977.65 allows remote attackers to manipulate authentication dialog presentation via a crafted HTML page, enabling bypass of system access restrictions through social engineering. The CVSS vector rates Integrity impact as High (I:H) with no privileges required (PR:N), yet Chromium's own team assigned Low severity, and EPSS exploitation probability is just 0.22% (12th percentile), reflecting the social engineering dependency. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to be running Google Chrome prior to version 152.0.7977.65 and to actively visit and interact with a crafted HTML page that initiates a WebAuthn authentication ceremony. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N scores 6.5 Medium: network-reachable, low complexity, no attacker privileges, but mandatory user interaction limiting opportunistic exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers a malicious website that initiates a WebAuthn authentication ceremony and crafts the HTML page to cause Chrome's dialog to misrepresent the relying party origin or credential type. A phishing email or malicious ad directs a target running a pre-152.0.7977.65 Chrome build to the site; the user, seeing a Passkey or Security Key prompt they believe is legitimate, approves the ceremony, inadvertently binding an attacker-controlled credential or authorizing unintended authentication. … |
| Remediation | The primary fix is upgrading Google Chrome to version 152.0.7977.65 or later, released via the Chrome stable channel and detailed 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 technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today