Critical CVEs CVE-2026-8390: WebAssembly Vulnerability in Mozilla Firefox June 25, 2026 ♡Follow0 A WebAssembly vulnerability in Mozilla Firefox discovered as part of OpenAI's Daybreak initiative. Discovered from: OpenAI Expands Daybreak Initiative with GPT-5.5-Cyber to Accelerate Vulnerability Patching CVE-2026-8390Mozilla FirefoxvulnerabilityWebAssembly