EUVD-2026-40761
GHSA-gj72-r692-rhjx
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
AC:H assigned independently because side-channel attacks require precise timing conditions and are subject to browser noise mitigations; all other metrics align with the provided vector.
Primary rating from Vendor (google).
CVSS VectorVendor: google
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
Side-channel information leakage in WebAuthentication in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)
AnalysisAI
Side-channel information leakage in the WebAuthentication component of Google Chrome on iOS (prior to 150.0.7871.47) exposes cross-origin data to remote attackers via a crafted HTML page, requiring only that a victim visit attacker-controlled content. The CVSS Confidentiality:High rating reflects the category of cross-origin data exposure, while Chromium's own internal severity classification of Low and an EPSS score of 0.21% (11th percentile) both signal that practical exploitation is considered unlikely at scale. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim actively navigates to and loads the attacker-controlled HTML page using Google Chrome on iOS (UI:R per CVSS), which necessitates a phishing or social engineering delivery step. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) is in tension with Chromium's own Low internal severity rating - the NVD C:H reflects the theoretical worst-case cross-origin data exposure, while Chromium's assessment likely accounts for the practical difficulty of reliably exploiting a side-channel under real-world noise and browser timer mitigations deployed post-Spectre. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious HTML page that programmatically invokes the WebAuthentication API and measures observable side-channel differences - such as response timing - in the Chrome iOS WebAuthn implementation. When a victim visits this page using Chrome on iOS, the attacker's script collects enough timing or state samples to infer cross-origin data about a target origin's authentication context. … |
| Remediation | Upgrade Google Chrome on iOS to version 150.0.7871.47 or later, available through the Apple App Store. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Moderate| Product | Status |
|---|---|
| SUSE Package Hub 15 SP7 | Fixed |
| openSUSE Tumbleweed | Fixed |
| SUSE Package Hub 15 SP7 | Affected |
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External POC / Exploit Code
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