CVE-2024-8385

Name: CVE-2024-8385
Creator: NVD / NIST
Published: 2024-09-03T13:15:05.803+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2024-8385 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A difference in the handling of StructFields and ArrayTypes in WASM could be used to trigger an exploitable type confusion vulnerability. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

A difference in the handling of StructFields and ArrayTypes in WASM could be used to trigger an exploitable type confusion vulnerability. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.57%

43.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 130.0
Mozilla	Firefox Esr	< 128.2

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1911909Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2024-39/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-40/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-43/

Timeline

Published: Sep 3, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-8385?

How severe is CVE-2024-8385?

CVE-2024-8385 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2024-8385?

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-2024-8385?

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

Scan your code now

Source: NVD / NIST