Technical impact
An inappropriate implementation in the Media subsystem of Google Chrome versions older than 149.0.7827.53 allows a remote attacker to leak cross‑origin data through a specially crafted HTML page. This flaw enables the attacker to read data that should be isolated by the same‑origin policy, compromising the confidentiality of information displayed by other web origins. The weakness aligns with CWE‑352, Cross‑Site Request Forgery, and CWE‑346, Missing Access Control.
Affected Systems
Google Chrome browsers running versions prior to 149.0.7827.53 are affected. The issue is present in the desktop stable channel and any product that incorporates the same media handling code up to that revision.
Risk and Exploitability
The vulnerability is exploitable by hosting a malicious web page that the victim visits; the attack requires the victim’s browser to load the crafted page. No public exploit has been reported, but the EPSS score of < 1% indicates a very low probability of exploitation. The CVSS score of 6.5 denotes a medium severity risk. It is not listed in the CISA KEV catalog. The Chromium security severity is labeled Medium, suggesting a moderate risk to confidentiality if a user visits a malicious page, but the impact is limited to data leakage rather than code execution or denial of service.
Debian DSA