EUVD-2026-34531
GHSA-9w25-4c6g-jhqr
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
Inappropriate implementation in Password Manager in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Cross-origin data leakage via Chrome's Password Manager component affects Google Chrome versions prior to 149.0.7827.53, exploitable when a user visits an attacker-crafted HTML page. The flaw stems from an inappropriate implementation that fails to enforce proper origin boundaries within the Password Manager, allowing a remote, unauthenticated attacker to read sensitive cross-origin data - potentially including credential-related information surfaced by the Password Manager. No public exploit code has been identified and no active exploitation is confirmed (not in CISA KEV), with EPSS at 0.03% (11th percentile), though the high confidentiality impact (C:H) warrants prompt patching given Chrome's massive deployment surface.
Technical ContextAI
The root cause is classified as CWE-346 (Origin Validation Error), meaning Chrome's Password Manager component does not properly verify that data or resource access requests originate from the expected, legitimate origin. Web browsers enforce the Same-Origin Policy (SOP) to isolate content across domains; a failure within Password Manager to validate origin allows a crafted page to induce the browser into disclosing data - such as autofill hints, credential metadata, or form data - belonging to a different origin. The affected component is Google Chrome's built-in Password Manager (not a third-party extension), which deeply integrates with the browser's rendering engine and DOM, making origin confusion particularly dangerous. The vulnerability manifests via a specially constructed HTML page, likely exploiting how the Password Manager reacts to form fields or autofill triggers across origins.
RemediationAI
The primary remediation is to update Google Chrome to version 149.0.7827.53 or later, which contains the vendor-released patch for this vulnerability; see the official release advisory at https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html. Chrome typically auto-updates, but administrators managing enterprise fleets should verify deployment via Chrome Browser Cloud Management or group policy. As a compensating control where immediate update is not possible, disabling the built-in Password Manager (via Chrome settings or enterprise policy: PasswordManagerEnabled=false) removes the vulnerable component from the attack surface, though this forces users to manage credentials elsewhere and disrupts autofill workflows. Restricting access to untrusted or unsolicited web content via web filtering proxies reduces exposure but does not eliminate risk. No configuration-based workaround fully substitutes for patching.
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Same weakness CWE-346 – Origin Validation Error
View allSame technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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