CVE-2024-9396

Name: CVE-2024-9396
Creator: NVD / NIST
Published: 2024-10-01T16:15:10.79+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.56%

Last modified Jun 17, 2026

CVE-2024-9396 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.56% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.56%

42.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 128.3.0
Mozilla	Firefox	< 131.0
Mozilla	Thunderbird	< 128.3.0
Mozilla	Thunderbird	>= 129.0, < 131.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1912471Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2024-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-47/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-49/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-50/Vendor Advisory

Timeline

Published: Oct 1, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-9396?

How severe is CVE-2024-9396?

CVE-2024-9396 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.

How do I fix CVE-2024-9396?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-9396?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST