Kubernetes Ingress Controller Enterprise CVEs and Security Vulnerabilities

CVE-2026-110354

haproxy: haproxy: Denial of Service via specially crafted HTTP/1.1 chunked request

HAProxy 3 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (persistent worker-thread CPU exhaustion) via an HTTP/1.1 chunked request. Although the H1 multiplexer drains the request before closing the stream, the parser repeatedly re-processes the same bytes without making progress. The affected thread stays busy at 100% CPU after timeouts expire and after the client disconnects, and repeated requests can consume all worker threads until the process is restarted.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

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Haproxy

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Haproxy Haproxy Enterprise Kubernetes Ingress Controller and 1 more

CVE-2026-110353

haproxy: HAProxy: Denial of Service via truncated HTTP/2 PING frame

HAProxy 3.2 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (worker-thread CPU exhaustion) via a truncated HTTP/2 PING frame. h2c_handle_ping in src/mux_h2.c does not check for a short read, unlike the other H2 frame handlers. Because the incomplete frame cannot be processed, its data is never consumed, and the H2 multiplexer tasklet is repeatedly woken by that pending data without making progress. The CPU spins until timeout http-request closes the connection, and an attacker opening many such connections can sustain high CPU usage.