CVE-2026-16350 -- CVSS 9.8 Vulnerability Briefing

CVE-2026-16350 | CVSS 9.8 (Critical) | Exploit: No known exploit

What Is It

CVE-2026-16350 is an incorrect boundary-condition vulnerability in Mozilla Firefox and Thunderbird's Audio/Video: cubeb component, which handles audio processing and device interaction.

Technical Detail

The flaw results from incorrect handling of boundary conditions within the cubeb audio component. An attacker may be able to trigger the issue by causing affected Firefox or Thunderbird installations to process crafted audio-related content or interact with an affected audio path. Successful exploitation could potentially result in remote code execution in the context of the affected application, although the available information does not specify a confirmed exploitation method or impact chain.

Exploitation Status

No known exploit has been reported or confirmed as of July 28, 2026. CVE-2026-16350 is not listed in CISA's Known Exploited Vulnerabilities catalog.

Who Is Targeting This

No specific threat actor attribution at this time.

What To Do

Prioritize updates for Mozilla Firefox and Thunderbird installations. Upgrade Firefox to version 153 or later, Firefox ESR to 115.38 or later or 140.13 or later, Thunderbird to version 153 or later, or Thunderbird 140.13 or later. No vendor-supported workaround or specific detection indicator has been provided; organizations should verify deployed versions through endpoint inventory and monitor Mozilla security advisories for additional technical details or exploitation updates.