CVE-2016-5289: Mozilla Firefox

Critical severity, CVSS 9.8. EPSS: 2% chance of exploitation in the next 30 days.

Memory safety bugs were reported in Firefox 49. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 50.

Affected products

• Mozilla Firefox: before 50.0 (fixed in 50.0)

Published 2018-06-11. Last modified 2026-06-17.