How severe is CVE-2024-8394?

CVE-2024-8394 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-8394 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-8394?

CVE-2024-8394 affects Mozilla Thunderbird. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-8394?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-8394 have an EU (EUVD) identifier?

Yes. CVE-2024-8394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-49147.

When was CVE-2024-8394 published?

CVE-2024-8394 was published on 2024-09-06 and last updated on 2026-06-17.

CVE-2024-8394

CVE-2024-8394 is a medium-severity vulnerability in Mozilla Thunderbird with a CVSS 3.x base score of 6.5. 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-416.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-49147
Weakness: CWE-416
Affected product: Mozilla Thunderbird
Published: 2024-09-06
Last modified: 2026-06-17

Description

When aborting the verification of an OTR chat session, an attacker could have caused a use-after-free bug leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 128.2.

Frequently asked questions

What is CVE-2024-8394?: When aborting the verification of an OTR chat session, an attacker could have caused a use-after-free bug leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 128.2.
How severe is CVE-2024-8394?: CVE-2024-8394 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-8394 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-8394?: CVE-2024-8394 affects Mozilla Thunderbird. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-8394?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-8394 have an EU (EUVD) identifier?: Yes. CVE-2024-8394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-49147.
When was CVE-2024-8394 published?: CVE-2024-8394 was published on 2024-09-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

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