How severe is CVE-2024-45506?

CVE-2024-45506 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-45506 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-45506?

CVE-2024-45506 primarily affects Haproxy. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-45506?

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-2024-45506 have an EU (EUVD) identifier?

Yes. CVE-2024-45506 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41515.

When was CVE-2024-45506 published?

CVE-2024-45506 was published on 2024-09-04 and last updated on 2026-06-17.

CVE-2024-45506

CVE-2024-45506 is a high-severity vulnerability in Haproxy with a CVSS 3.x base score of 7.5. 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-835.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-41515
Weakness: CWE-835
Affected product: Haproxy
Published: 2024-09-04
Last modified: 2026-06-17

Description

HAProxy 2.9.x before 2.9.10, 3.0.x before 3.0.4, and 3.1.x through 3.1-dev6 allows a remote denial of service for HTTP/2 zero-copy forwarding (h2_send loop) under a certain set of conditions, as exploited in the wild in 2024.

Frequently asked questions

What is CVE-2024-45506?: HAProxy 2.9.x before 2.9.10, 3.0.x before 3.0.4, and 3.1.x through 3.1-dev6 allows a remote denial of service for HTTP/2 zero-copy forwarding (h2_send loop) under a certain set of conditions, as exploited in the wild in 2024.
How severe is CVE-2024-45506?: CVE-2024-45506 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-45506 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-45506?: CVE-2024-45506 primarily affects Haproxy. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-45506?: 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-2024-45506 have an EU (EUVD) identifier?: Yes. CVE-2024-45506 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41515.
When was CVE-2024-45506 published?: CVE-2024-45506 was published on 2024-09-04 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:3.1:dev0:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:3.1:dev1:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:3.1:dev2:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:3.1:dev3:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:3.1:dev4:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:3.1:dev5:*:*:*:*:*:*

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