MEDIUM 5.3 Microsoft

CVE-2024-49214

QUIC in HAProxy 3.1.x before 3.1-dev7, 3.0.x before 3.0.5, and 2.9.x before 2.9.11 allows opening a 0-RTT session with a spoofed IP address. This can bypass the IP allow/block list functionality.

Microsoft Security Update 2026-Aug: QUIC in HAProxy 3.1.x before 3.1-dev7, 3.0.x before 3.0.5, and 2.9.x before 2.9.11 allows opening a 0-RTT session with a spoofed IP address. This can bypass the IP allow/block list functionality.

Affected Products

cbl2 haproxy 2.4.24-1 on CBL Mariner 2.0
cbl2 haproxy 2.4.24-1

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49214
https://nvd.nist.gov/vuln/detail/CVE-2024-49214

Published: 2026-08-06 · Source: Microsoft · Feed updated: 2026-08-10

This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-08-06 via Microsoft. Affected: cbl2 haproxy 2.4.24-1 on CBL Mariner 2.0, cbl2 haproxy 2.4.24-1.

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