Via Steam Community:

• Fixed crash when entering certain malformed strings into the game console. Thanks to Marshal Webb from BackConnect, Inc for reporting this.
• Fixed crash when loading a specially crafted malformed BSP file. Thanks to Grant Hernandez (@Digital_Cold) for reporting this.
• Fixed malformed SAV files allowing arbitrary files to be written into the game folder. Thanks to Vsevolod Saj for reporting this.
• Fixed a crash when quickly changing weapons that are consumable. Thanks to Sam Vanheer for reporting this.
• Fixed crash when setting custom decals