{"api_version":"1","generated_at":"2026-09-21T16:47:37+00:00","cve":"CVE-2026-93492","urls":{"html":"https://cve.report/CVE-2026-93492","api":"https://cve.report/api/cve/CVE-2026-93492.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93492","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93492"},"summary":{"title":"Io.netty/netty-codec-http2: netty: http/2 hpackencoder dos with large table size","description":"A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).","state":"PUBLISHED","assigner":"redhat","published_at":"2026-09-18 13:18:38","updated_at":"2026-09-18 19:06:08"},"problem_types":["CWE-1035","CWE-1035 CWE-1035"],"metrics":[{"version":"3.1","source":"secalert@redhat.com","type":"Secondary","score":"5.3","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"5.3","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536895","name":"https://bugzilla.redhat.com/show_bug.cgi?id=2536895","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93492","name":"https://access.redhat.com/security/cve/CVE-2026-93492","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93492","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93492","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Red Hat","product":"Red Hat AMQ Broker 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat build of Apache Camel 4 for Quarkus 3","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat build of Apache Camel for Spring Boot 4","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat build of Apicurio Registry 3","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat build of Debezium 3","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat Build of Keycloak","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat build of Quarkus","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat Data Grid 8","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat Fuse 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 8","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat Single Sign-On 7","version":"","platforms":[]}],"timeline":[{"source":"CNA","time":"2026-09-10T00:41:18.000Z","lang":"en","value":"Reported to Red Hat."},{"source":"CNA","time":"2026-09-10T00:41:18.000Z","lang":"en","value":"Made public."}],"solutions":[],"workarounds":[{"source":"CNA","title":"","value":"Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"93492","cve":"CVE-2026-93492","epss":"0.003010000","percentile":"0.229550000","score_date":"2026-09-20","updated_at":"2026-09-21 00:10:08"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-93492","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-09-18T14:40:19.700669Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-09-18T14:41:19.955Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:amq_broker:7"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat AMQ Broker 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:camel_quarkus:3"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat build of Apache Camel 4 for Quarkus 3","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:camel_spring_boot:4"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat build of Apache Camel for Spring Boot 4","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:apicurio_registry:3"],"defaultStatus":"unknown","packageName":"netty-codec-http2","product":"Red Hat build of Apicurio Registry 3","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:debezium:3"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat build of Debezium 3","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat Build of Keycloak","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:quarkus:3"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat build of Quarkus","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:jboss_data_grid:8"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat Data Grid 8","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:jboss_fuse:7"],"defaultStatus":"unknown","packageName":"netty-codec-http2","product":"Red Hat Fuse 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"unknown","packageName":"netty-codec-http2","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","packageName":"netty-codec-http2","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:red_hat_single_sign_on:7"],"defaultStatus":"unknown","packageName":"netty-codec-http2","product":"Red Hat Single Sign-On 7","vendor":"Red Hat"}],"datePublic":"2026-09-10T00:41:18.000Z","descriptions":[{"lang":"en","value":"A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS)."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Moderate"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1035","description":"CWE-1035","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-18T12:49:03.688Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat"},"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-93492"},{"name":"RHBZ#2536895","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536895"}],"timeline":[{"lang":"en","time":"2026-09-10T00:41:18.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-09-10T00:41:18.000Z","value":"Made public."}],"title":"Io.netty/netty-codec-http2: netty: http/2 hpackencoder dos with large table size","workarounds":[{"lang":"en","value":"Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}],"x_generator":{"engine":"cvelib 1.8.0"},"x_redhatCweChain":"CWE-1035"}},"cveMetadata":{"assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","assignerShortName":"redhat","cveId":"CVE-2026-93492","datePublished":"2026-09-18T12:49:03.688Z","dateReserved":"2026-09-18T07:15:03.252Z","dateUpdated":"2026-09-18T14:41:19.955Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-18 13:18:38","lastModifiedDate":"2026-09-18 19:06:08","problem_types":["CWE-1035","CWE-1035 CWE-1035"],"metrics":{"cvssMetricV31":[{"source":"secalert@redhat.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-18T14:40:19.700669Z","id":"CVE-2026-93492","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93492","Ordinal":"1","Title":"Io.netty/netty-codec-http2: netty: http/2 hpackencoder dos with ","CVE":"CVE-2026-93492","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93492","Ordinal":"1","NoteData":"A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).","Type":"Description","Title":"Io.netty/netty-codec-http2: netty: http/2 hpackencoder dos with "}]}}}