{"id":"CVE-2026-110353","revision":null,"records":[{"revision":"8b74bd850ce943b0875ce0503e75867a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-110353","aliases":[],"title":"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 oth…","description":"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.","state":0,"publishedAt":"2026-10-22T02:53:33.198+00:00","modifiedAt":"2026-10-22T19:10:34.428+00:00","affected":[{"ecosystem":"Vendor product","name":"HAProxy","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"mux-h2\"\n                    ],\n                    \"product\": \"HAProxy\",\n                    \"programFiles\": [\n                        \"src/mux_h2.c\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"h2c_handle_ping\"\n                        }\n                    ],\n                    \"repo\": \"https://git.haproxy.org/git/haproxy.git/\",\n                    \"vendor\": \"HAProxy\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"3.2.26\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.2.0\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"3.3.17\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.3.0\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"3.4.6\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.4.0\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"3.5-dev9\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.5-dev\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"HAProxy Enterprise Edition","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"HAProxy Enterprise Edition\",\n                    \"vendor\": \"HAProxy\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"3.2r1-378.1259\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.2.0r1\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"3.3r1-377.1005\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.3.0r1\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Kubernetes Ingress Controller","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Kubernetes Ingress Controller\",\n                    \"vendor\": \"HAProxy\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"3.2.17\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.2.0\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Kubernetes Ingress Controller Enterprise","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Kubernetes Ingress Controller Enterprise\",\n                    \"vendor\": \"Haproxy\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"3.2.17-ee1\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.2.0\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"3.0.16-ee17\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.0\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"1.11.14-ee11\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.11\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.haproxy.org/?p=haproxy.git;a=commit;h=cec63e95f62a7412484f1134f5aa227e5b7e1466"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110353","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110353","identifiers":["CVE-2026-110353"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-08T07:06:42.2208240+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-08T07:06:42.220824+00:00","lastSuccessAt":"2026-11-08T07:06:42.3839308+00:00","error":null,"lastVerifiedAt":"2026-11-08T07:06:42.3839321+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-1167b7290e843ce2b7ccffc299ffe73e10a65833db7c7e05840c0f2de122f77a","complete":true,"records":421096,"lastAttemptAt":"2026-11-08T07:06:41.7244391+00:00","lastSuccessAt":"2026-11-08T07:06:41.6928813+00:00","error":null,"lastVerifiedAt":"2026-11-08T07:06:41.7244391+00:00","snapshotPublishedAt":"2026-11-08T06:27:58+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ce0df89a405747cda5b7c61ae0b48fb2","complete":true,"records":13633,"lastAttemptAt":"2026-11-08T07:07:08.1374238+00:00","lastSuccessAt":"2026-11-08T05:08:40.263+00:00","error":null,"lastVerifiedAt":"2026-11-08T05:08:40.263+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T07:06:42.2208240+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T07:06:42.220824+00:00","lastSuccessAt":"2026-11-08T07:06:42.3846752+00:00","error":null,"lastVerifiedAt":"2026-11-08T07:06:42.3846753+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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