EUVD-2026-66080
GHSA-hc64-8gxw-rx5r
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack is executed by a co-installed local app (AV:L) with no prior privileges or victim interaction (PR:N/UI:N); origin bypass primarily exposes cross-origin data (C:H) with limited integrity and no availability impact.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Incorrect authorization in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to bypass web origin policy via a co-installed app. (Chromium security severity: Low)
AnalysisAI
Web origin policy bypass in Google Chrome for Android before 152.0.7977.65 lets a malicious co-installed app abuse the CustomTabs component to escape same-origin restrictions and access content it should not. The flaw is a local privilege/authorization issue (Chromium-rated Low severity) requiring a second attacker-controlled app already present on the device; no public exploit has been identified and EPSS probability is very low (0.11%).
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a second, attacker-controlled application to be co-installed on the same Android device as Chrome (versions below 152.0.7977.65); the attack is executed locally by that app against Chrome's CustomTabs component, not remotely over the network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals conflict sharply and must be read together. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker convinces the victim to install a benign-looking Android app that is co-installed alongside Chrome. Once present, that app abuses the CustomTabs authorization flaw to bypass the web origin policy and read or interact with content bound to a different web origin the user is signed into. … |
| Remediation | Vendor-released patch: 152.0.7977.65 - update Chrome for Android to 152.0.7977.65 or later via Google Play, which for most users happens automatically. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit Chrome versions currently deployed on corporate Android devices via your mobile device management (MDM) console. …
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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