CVE-2023-37209: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

A use-after-free condition existed in `NotifyOnHistoryReload` where a `LoadingSessionHistoryEntry` object was freed and a reference to that object remained. This resulted in a potentially exploitable condition when the reference to that object was later reused. This vulnerability affects Firefox < 115.

Affected products

• Mozilla Firefox: before 115.0 (fixed in 115.0)

Published 2023-07-05. Last modified 2026-06-17.