CVE-2026-16359

CRITICAL
Published Jul 21, 2026 Modified Jul 21, 2026 CWE-119

Description

Incorrect boundary conditions in the Audio/Video: GMP component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13.

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CVSS v3.1 Score

9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-119 Buffer Overflow

References

Frequently Asked Questions

What is CVE-2026-16359? +
Incorrect boundary conditions in the Audio/Video: GMP component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. It has a CVSS v3.1 base score of 9.1 (CRITICAL).
How severe is CVE-2026-16359? +
CVE-2026-16359 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.
How do I check if I'm vulnerable to CVE-2026-16359? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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