CVE-2026-15775 describes a security flaw in the V8 JavaScript engine used by Google Chrome versions before 150.0.7871.125. The vulnerability involves improper enforcement of the same origin policy, which is a critical security control that restricts how documents or scripts loaded from one origin can interact with resources from another origin. An attacker can exploit this by crafting a malicious HTML page to bypass these restrictions. The issue is categorized under CWE-346 (Origin Validation Error). The CVSS vector indicates the attack requires no privileges and user interaction, with network attack vector, low attack complexity, and results in a high integrity impact but no confidentiality or availability impact. The vendor advisory URL is provided but does not explicitly state patch availability or remediation details.

Successful exploitation allows a remote attacker to bypass the same origin policy in affected versions of Google Chrome, potentially enabling unauthorized actions that compromise the integrity of web content or scripts. There is no reported impact on confidentiality or availability. No known exploits have been observed in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0353146366.html for current remediation guidance. Until official fixes are confirmed, users should exercise caution when visiting untrusted websites and consider updating to the latest Chrome version once updates are available.