Integer Overflow Vulnerability in Firefox's Audio/Video Component
CVE-2026-16395

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
21 July 2026

What is CVE-2026-16395?

An integer overflow vulnerability exists within the Audio/Video component of Firefox, potentially allowing attackers to trigger unexpected behavior. This flaw was addressed in Firefox version 153, emphasizing the importance of keeping your software updated to safeguard against possible exploits.

Affected Version(s)

Firefox 153

Thunderbird 153

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2047221
https://www.mozilla.org/security/advisories/mfsa2026-68/
https://www.mozilla.org/security/advisories/mfsa2026-71/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

stevej
.