CVE-2024-9396

HIGH 8.8CVE-2024-9396 · Published 01/10/2024 · updated 17/06/2026

In short

CVE-2024-9396 is a HIGH (CVSS 8.8) vulnerability affecting firefox (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 0.59%, higher than 48.2% of all vulnerabilities.
Fix: update to 128.3.0, 131.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 128.3.0< 131.0`	`128.3.0131.0`
thunderbird mozilla	`≥ 129.0, < 131.0< 128.3.0`	`131.0128.3.0`

Description

It is currently unknown if this issue is exploitable but a condition may arise where the structured clone of certain objects could lead to memory corruption. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.

References

bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
mozilla.org/security/advisories/mfsa2024-46 · Vendor Advisory
mozilla.org/security/advisories/mfsa2024-47 · Vendor Advisory
mozilla.org/security/advisories/mfsa2024-49 · Vendor Advisory
mozilla.org/security/advisories/mfsa2024-50 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 128.3.0< 131.0

128.3.0131.0

thunderbird

mozilla

≥ 129.0, < 131.0< 128.3.0

131.0128.3.0

More vulnerabilities in firefox

See all →