CVE-2024-8387

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-03 · updated 2026-06-17
Weakness: CWE-787

Description

Memory safety bugs present in Firefox 129, Firefox ESR 128.1, and Thunderbird 128.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.

Affected products

Mozilla Firefox: 129.0
Mozilla Firefox ESR: 128.1
Mozilla Thunderbird: 128.1

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1857607%2C1911858%2C1914009
https://www.mozilla.org/security/advisories/mfsa2024-39/
https://www.mozilla.org/security/advisories/mfsa2024-40/
https://www.mozilla.org/security/advisories/mfsa2024-43/

Get alerted when CVE-2024-8387 or the next vulnerability affects your stack