How severe is CVE-2024-1765?

CVE-2024-1765 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-1765 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-1765?

CVE-2024-1765 primarily affects Cloudflare Quiche. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-1765?

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

Does CVE-2024-1765 have an EU (EUVD) identifier?

Yes. CVE-2024-1765 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0855.

When was CVE-2024-1765 published?

CVE-2024-1765 was published on 2024-03-12 and last updated on 2026-06-17.

CVE-2024-1765

CVE-2024-1765 is a medium-severity vulnerability in Cloudflare Quiche with a CVSS 3.x base score of 5.9. 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0855
Weakness: CWE-770
Affected product: Cloudflare Quiche
Published: 2024-03-12
Last modified: 2026-06-17

Description

Cloudflare Quiche (through version 0.19.1/0.20.0) was affected by an unlimited resource allocation vulnerability causing rapid increase of memory usage of the system running quiche server or client. A remote attacker could take advantage of this vulnerability by repeatedly sending an unlimited number of 1-RTT CRYPTO frames after previously completing the QUIC handshake. Exploitation was possible for the duration of the connection which could be extended by the attacker. quiche 0.19.2 and 0.20.1 are the earliest versions containing the fix for this issue.

Frequently asked questions

What is CVE-2024-1765?: Cloudflare Quiche (through version 0.19.1/0.20.0) was affected by an unlimited resource allocation vulnerability causing rapid increase of memory usage of the system running quiche server or client. A remote attacker could take advantage of this vulnerability by repeatedly sending an unlimited number of 1-RTT CRYPTO frames after previously completing the QUIC handshake. Exploitation was possible for the duration of the connection which could be extended by the attacker. quiche 0.19.2 and 0.20.1 are the earliest versions containing the fix for this issue.
How severe is CVE-2024-1765?: CVE-2024-1765 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-1765 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-1765?: CVE-2024-1765 primarily affects Cloudflare Quiche. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-1765?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-1765 have an EU (EUVD) identifier?: Yes. CVE-2024-1765 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0855.
When was CVE-2024-1765 published?: CVE-2024-1765 was published on 2024-03-12 and last updated on 2026-06-17.

References

https://github.com/cloudflare/quiche/security/advisories/GHSA-78wx-jg4j-5j6g

Affected products (2)

cpe:2.3:a:cloudflare:quiche:*:*:*:*:*:rust:*:*
cpe:2.3:a:cloudflare:quiche:0.20.0:*:*:*:*:rust:*:*

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