Main Vulnerability Database Vulnerabilities #VU144102

Buffer overflow in Mozilla Firefox and Firefox for Android - CVE-2026-74989

Published: August 18, 2026

Vulnerability identifier: #VU144102

CSH Severity: Medium

CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-74989

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to memory corruption in multiple unspecified components when processing web content. A remote attacker can supply crafted web content to cause a denial of service.

Some of the internally found bugs showed evidence of memory corruption or another security-relevant defect.

Affected software

Mozilla Firefox
Firefox for Android

How to mitigate CVE-2026-74989

Install security update from vendor's website.

Mozilla Firefox - update to 154.0
Firefox for Android - update to 154.0

External References

Related Security Bulletins