EUVD-2026-34737
GHSA-vx7f-665f-92jv
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
4DescriptionCVE.org
Inappropriate implementation in Cast in Google Chrome prior to 149.0.7827.53 allowed an attacker on the local network segment to bypass discretionary access control via malicious network traffic. (Chromium security severity: Low)
AnalysisAI
Discretionary access control bypass in Google Chrome's Cast feature (prior to 149.0.7827.53) allows an attacker positioned on the local network segment to interfere with Cast functionality via crafted malicious network traffic. The vulnerability stems from improper privilege management (CWE-269) within the Cast implementation, resulting in limited confidentiality and integrity impact (CVSS 5.1). No public exploit code has been identified at time of analysis, and CISA KEV listing is absent; however, the no-authentication-required condition and the network-adjacent attack surface make this relevant for environments where Chrome's Cast feature is actively used on shared or untrusted network segments.
Technical ContextAI
Google Chrome's Cast feature enables streaming of browser content or media to Chromecast and Cast-compatible devices over the local network using the Cast protocol (built on DIAL, mDNS, and proprietary Google signaling). The root cause is classified under CWE-269 (Improper Privilege Management), indicating that the Cast subsystem fails to correctly enforce discretionary access controls - likely allowing an attacker-controlled device or packet stream to impersonate or manipulate Cast session signals without proper authorization checks. Affected CPE, per EUVD data, covers all Google Chrome versions prior to 149.0.7827.53 across desktop platforms. The Chromium project internally rated this as Low severity, consistent with the constrained impact scope (C:L/I:L/A:N) and the requirement for network adjacency.
RemediationAI
Update Google Chrome to version 149.0.7827.53 or later, which contains the vendor-released patch per the stable channel advisory at chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html. Chrome's auto-update mechanism will deliver this fix automatically on most desktop installations; verify via chrome://settings/help. As a compensating control where immediate patching is not possible, disabling the Cast feature via enterprise policy (EnableMediaRouter=false in Chrome enterprise policy) will eliminate the attack surface entirely, though this removes Cast/Chromecast functionality for all users. Alternatively, network-level controls restricting mDNS and Cast-related traffic (UDP port 1900 for SSDP, TCP/UDP 8008-8009 for Cast receivers) on untrusted LAN segments can reduce exposure. Note that blocking Cast traffic at the network layer may cause Cast device discovery failures but does not affect core browser functionality.
Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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External POC / Exploit Code
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