EUVD-2026-34517
GHSA-cj5q-m4jx-3mh8
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Lifecycle Timeline
4DescriptionCVE.org
Insufficient validation of untrusted input in Cast in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Same-origin policy bypass in the Cast component of Google Chrome (prior to 149.0.7827.53) enables a remote unauthenticated attacker to violate cross-origin integrity protections via a crafted HTML page, requiring only that the target user visit the attacker-controlled page. The CVSS vector confirms high integrity impact with no confidentiality or availability consequence, indicating the attack allows unauthorized cross-origin writes or data manipulation rather than information disclosure. No public exploit code has been identified at time of analysis, and the EPSS score of 0.02% (6th percentile) signals low observed exploitation interest despite the medium-severity Chromium classification.
Technical ContextAI
The vulnerability resides in Chrome's Cast subsystem - the component responsible for streaming content to Chromecast and Cast-enabled devices - and stems from CWE-20 (Improper Input Validation) where attacker-controlled input from a crafted HTML page is insufficiently validated before being processed. The Same-Origin Policy (SOP) is a foundational browser security boundary preventing scripts from one origin accessing resources of another; bypassing it enables cross-origin manipulation of content or state. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) indicates this bypass specifically affects data integrity (I:H) without granting read access (C:N), consistent with a scenario where the Cast component permits cross-origin writes or spoofing. Affected product per EUVD: Google Chrome versions in the range below 149.0.7827.53.
RemediationAI
Update Google Chrome to version 149.0.7827.53 or later, which contains the vendor-released patch per the stable channel advisory at https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html. Chrome's auto-update mechanism should apply this automatically on restart; users can manually trigger the update via Chrome menu > Help > About Google Chrome. As a compensating control for environments where immediate updates are not feasible, disabling or restricting access to the Cast feature (via enterprise policy CastReceiverEnabled=false or equivalent) removes the vulnerable code path entirely, though this disables casting functionality. Organizations managing Chromium-based browsers (Edge, Brave, etc.) should check their respective vendors for equivalent patch availability, as the upstream fix may not yet be incorporated.
Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player
V8 in Google Chrome prior to 54.0.2840.90 for Linux, and 54.0.2840.85 for Android, and 54.0.2840.87 for Windows and Mac
Type confusion in V8 in Google Chrome prior to 59.0.3071.86 for Linux, Windows, and Mac, and 59.0.3071.92 for Android, a
The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google Chrome before 49.0.2623.108, do
Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderb
Incorrect handling of complex species in V8 in Google Chrome prior to 57.0.2987.98 for Linux, Windows, and Mac and 57.0.
The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbi
An issue was discovered in the Cisco WebEx Extension before 1.0.7 on Google Chrome, the ActiveTouch General Plugin Conta
The XrayWrapper implementation in Mozilla Firefox before 35.0 and SeaMonkey before 2.32 does not properly interact with
The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbi
The Web IDL implementation in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and Se
Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13
Same weakness CWE-20 – Improper Input Validation
View allSame technique Authentication Bypass
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
Share
External POC / Exploit Code
Leaving vuln.today