CVE-2026-18015 describes an inappropriate implementation in the Tint component of Google Chrome on macOS. The vulnerability affects versions prior to 151.0.7922.72 and allows a remote attacker to potentially perform a sandbox escape. The attack vector involves a specially crafted HTML page, meaning exploitation can be triggered via the browser without additional user interaction beyond visiting a malicious page. Chromium has rated the severity of this vulnerability as Low. The fix was included in the stable channel desktop update released in July 2026. Despite the low Chromium severity rating, sandbox escapes are inherently serious as they can allow attackers to break out of browser isolation. Users on macOS running affected Chrome versions should update immediately to the patched release.