CVE-2026-56003

A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients to execute code within the X server...

Multiple Mozilla Firefox / Thunderbird / Seamonkey security vulnerabilities

Crossite scripting with functions prototypes. Information leak. Buffer overflows on oversized Content-Type fields in messages. Memory corruption on SVG header. Crossite scripting with img.src. DoS. JavaScript watchpoint privilege escalation. CSS image cursor property buffer overflow. Multiple...