Chrome, Firefox Updates Patch 115 Vulnerabilities
securityweek.com Sep 16, 2026

Chrome, Firefox Updates Patch 115 Vulnerabilities

AI-summarised brief · reviewed before publication

Mozilla released Firefox 156, fixing 73 vulnerabilities, 29 of which are high‑severity. The fixes target use‑after‑free and privilege escalation flaws, along with sandbox escape, site isolation, boundary condition, and mitigation bypass issues. Unlike prior advisories that grouped memory‑safety bugs under a single CVE, this update lists each individual bug, explaining the higher CVE count. The same security patches appear in Thunderbird 156, 140.16, and Firefox ESR 153.3, 140.16, and 115.41. No wild exploitation reports exist, but users are urged to update promptly.

💡 Why It Matters

  • · The detailed CVE disclosure improves transparency, enabling security teams to assess specific risks faster.
  • · Prompt updates reduce exposure to potentially exploitable memory‑safety bugs that could compromise user data.