How severe is CVE-2024-8381?

CVE-2024-8381 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-8381 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-8381?

CVE-2024-8381 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-8381?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-8381 have an EU (EUVD) identifier?

Yes. CVE-2024-8381 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-49137.

When was CVE-2024-8381 published?

CVE-2024-8381 was published on 2024-09-03 and last updated on 2026-06-17.

CVE-2024-8381

CVE-2024-8381 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-843.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 4% (91st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-49137
Weakness: CWE-843
Affected product: Mozilla Firefox
Published: 2024-09-03
Last modified: 2026-06-17

Description

A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the `with` environment. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

Frequently asked questions

What is CVE-2024-8381?: A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the `with` environment. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.
How severe is CVE-2024-8381?: CVE-2024-8381 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-8381 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-8381?: CVE-2024-8381 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-8381?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-8381 have an EU (EUVD) identifier?: Yes. CVE-2024-8381 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-49137.
When was CVE-2024-8381 published?: CVE-2024-8381 was published on 2024-09-03 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*

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