How severe is CVE-2024-39936?

CVE-2024-39936 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-39936 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-39936?

CVE-2024-39936 affects Qt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-39936?

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

Does CVE-2024-39936 have an EU (EUVD) identifier?

Yes. CVE-2024-39936 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38310.

When was CVE-2024-39936 published?

CVE-2024-39936 was published on 2024-07-04 and last updated on 2026-06-17.

CVE-2024-39936

CVE-2024-39936 is a high-severity vulnerability in Qt with a CVSS 3.x base score of 8.6. 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-367.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-38310
Weakness: CWE-367
Affected product: Qt
Published: 2024-07-04
Last modified: 2026-06-17

Description

An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, and 6.6.x through 6.7.x before 6.7.3. Code to make security-relevant decisions about an established connection may execute too early, because the encrypted() signal has not yet been emitted and processed..

Frequently asked questions

What is CVE-2024-39936?: An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, and 6.6.x through 6.7.x before 6.7.3. Code to make security-relevant decisions about an established connection may execute too early, because the encrypted() signal has not yet been emitted and processed..
How severe is CVE-2024-39936?: CVE-2024-39936 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-39936 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-39936?: CVE-2024-39936 affects Qt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-39936?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-39936 have an EU (EUVD) identifier?: Yes. CVE-2024-39936 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38310.
When was CVE-2024-39936 published?: CVE-2024-39936 was published on 2024-07-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*

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