CVE-2023-5170: Mozilla Firefox

High severity, CVSS 7.4. EPSS: 0.7% chance of exploitation in the next 30 days.

In canvas rendering, a compromised content process could have caused a surface to change unexpectedly, leading to a memory leak of a privileged process. This memory leak could be used to effect a sandbox escape if the correct data was leaked. This vulnerability affects Firefox < 118.

Affected products

• Mozilla Firefox: before 118.0 (fixed in 118.0)

Published 2023-09-27. Last modified 2026-06-17.