CVE-2025-4918

CVE-2025-4918 describes an out-of-bounds read/write on a JavaScript Promise object affecting Firefox and Thunderbird. Affected: Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1; Thunderbird < 128.10.2, Thunderbird

CVE-2025-4919

CVE-2025-4919 describes an out-of-bounds read/write in JavaScript objects caused by confusing array index sizes, affecting Firefox including aliases (Firefox < 138.0.4, ESR < 128.10.1, ESR < 115.23.1) and Thunderbird (Thunderbird < 128.10.2; Thunderbird