{"schema_version":"2","view":"grouped","data":[{"id":3277,"cve_ids":["CVE-2026-100659"],"payload":{"kind":"advisory","title":"Netty 4.2.0 through 4.2.17 HTTP/3 Request Routing Bypass","summary":"Netty's HTTP/3 codec (io.netty:netty-codec-http3) in versions 4.2.0.Final through 4.2.17.Final does not enforce the RFC 9114 requirement that the :authority pseudo-header field and a literal host header field, when both present, carry the same value. A remote unauthenticated peer can send a single HEADERS frame containing both fields with differing, attacker-controlled values; the request is accepted and delivered to the application with two conflicting authorities, allowing routing, virtual-host, and access-control decisions to be bypassed when different components in the request path consult different fields. This issue is fixed in 4.2.18.Final.","evidence":"cve:CVE-2026-100659","products":[{"name":{"value":"netty","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"medium","structured":{"id":"CVE-2026-100659","aliases":["CVE-2026-100659"],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","baseScore":6.9,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","userInteraction":"NONE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"NONE","vulnIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","vulnConfidentialityImpact":"LOW"}},{"format":"CVSS","cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}}],"affected":[{"vendor":"netty","product":"netty","versions":[{"status":"affected","version":"4.2.0.Final","lessThan":"4.2.18.Final","versionType":"custom"},{"status":"unaffected","version":"4.2.18.Final","versionType":"custom"}],"packageURL":"pkg:maven/io.netty/netty-codec-http3","defaultStatus":"unaffected"}],"modified":"2026-09-28T18:17:29.170Z","provider":"cve","references":["https://github.com/netty/netty/security/advisories/GHSA-q9pg-8h3j-8hvm","https://www.vulncheck.com/advisories/netty-4.2.0-through-4.2.18-http-3-request-routing-bypass"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-100659","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-28T18:16:52.799456Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-28T18:17:29.170Z"}}],"cna":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-27T16:27:45.915Z"}}},"related_cves":[{"value":"CVE-2026-100659","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"},"group_id":"advisory:07b242b9-6d9f-4c32-8854-a9e90b4e3d19","priority":{"reasons":[],"severity":"medium","linked_cves":[],"fix_available":false,"known_exploited":false,"publisher_severity":"medium"},"revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100659","advisory_id":"07b242b9-6d9f-4c32-8854-a9e90b4e3d19","event_types":["advisory"],"published_at":"2026-10-24T21:32:12.065237+00:00","technologies":["core-cve","netty"],"context_update":false,"extraction_method":"structured","source_published_at":"2026-09-26T13:23:26.859+00:00","detail_url":"/advisories/advisory%3A07b242b9-6d9f-4c32-8854-a9e90b4e3d19","group":{"id":"advisory:07b242b9-6d9f-4c32-8854-a9e90b4e3d19","revision":1,"primary_event_id":3289,"change":"published","superseded_by":[],"changed":{"id":3289,"cve_ids":["CVE-2026-100659"],"payload":{"kind":"advisory","title":"Netty 4.2.0 through 4.2.17 HTTP/3 Request Routing Bypass","summary":"Netty's HTTP/3 codec (io.netty:netty-codec-http3) in versions 4.2.0.Final through 4.2.17.Final does not enforce the RFC 9114 requirement that the :authority pseudo-header field and a literal host header field, when both present, carry the same value. A remote unauthenticated peer can send a single HEADERS frame containing both fields with differing, attacker-controlled values; the request is accepted and delivered to the application with two conflicting authorities, allowing routing, virtual-host, and access-control decisions to be bypassed when different components in the request path consult different fields. This issue is fixed in 4.2.18.Final.","evidence":"cve:CVE-2026-100659","products":[{"name":{"value":"netty","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"medium","structured":{"id":"CVE-2026-100659","aliases":["CVE-2026-100659"],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","baseScore":6.9,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","userInteraction":"NONE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"NONE","vulnIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","vulnConfidentialityImpact":"LOW"}},{"format":"CVSS","cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}}],"affected":[{"vendor":"netty","product":"netty","versions":[{"status":"affected","version":"4.2.0.Final","lessThan":"4.2.18.Final","versionType":"custom"},{"status":"unaffected","version":"4.2.18.Final","versionType":"custom"}],"packageURL":"pkg:maven/io.netty/netty-codec-http3","defaultStatus":"unaffected"}],"modified":"2026-09-28T18:17:29.170Z","provider":"cve","references":["https://github.com/netty/netty/security/advisories/GHSA-q9pg-8h3j-8hvm","https://www.vulncheck.com/advisories/netty-4.2.0-through-4.2.18-http-3-request-routing-bypass"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-100659","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-28T18:16:52.799456Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-28T18:17:29.170Z"}}],"cna":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-27T16:27:45.915Z"}}},"related_cves":[{"value":"CVE-2026-100659","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"},"group_id":"advisory:07b242b9-6d9f-4c32-8854-a9e90b4e3d19","priority":{"reasons":[],"severity":"medium","linked_cves":[],"fix_available":false,"known_exploited":false,"publisher_severity":"medium"},"revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100659","advisory_id":"07b242b9-6d9f-4c32-8854-a9e90b4e3d19","event_types":["advisory"],"published_at":"2026-10-24T21:32:12.065237+00:00","technologies":["core-cve","netty"],"context_update":false,"extraction_method":"structured","source_published_at":"2026-09-26T13:23:26.859+00:00","detail_url":"/events/3289"},"members":[{"id":3289,"cve_ids":["CVE-2026-100659"],"payload":{"kind":"advisory","title":"Netty 4.2.0 through 4.2.17 HTTP/3 Request Routing Bypass","summary":"Netty's HTTP/3 codec (io.netty:netty-codec-http3) in versions 4.2.0.Final through 4.2.17.Final does not enforce the RFC 9114 requirement that the :authority pseudo-header field and a literal host header field, when both present, carry the same value. A remote unauthenticated peer can send a single HEADERS frame containing both fields with differing, attacker-controlled values; the request is accepted and delivered to the application with two conflicting authorities, allowing routing, virtual-host, and access-control decisions to be bypassed when different components in the request path consult different fields. This issue is fixed in 4.2.18.Final.","evidence":"cve:CVE-2026-100659","products":[{"name":{"value":"netty","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"medium","structured":{"id":"CVE-2026-100659","aliases":["CVE-2026-100659"],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","baseScore":6.9,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","userInteraction":"NONE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"NONE","vulnIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","vulnConfidentialityImpact":"LOW"}},{"format":"CVSS","cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}}],"affected":[{"vendor":"netty","product":"netty","versions":[{"status":"affected","version":"4.2.0.Final","lessThan":"4.2.18.Final","versionType":"custom"},{"status":"unaffected","version":"4.2.18.Final","versionType":"custom"}],"packageURL":"pkg:maven/io.netty/netty-codec-http3","defaultStatus":"unaffected"}],"modified":"2026-09-28T18:17:29.170Z","provider":"cve","references":["https://github.com/netty/netty/security/advisories/GHSA-q9pg-8h3j-8hvm","https://www.vulncheck.com/advisories/netty-4.2.0-through-4.2.18-http-3-request-routing-bypass"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-100659","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-28T18:16:52.799456Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-28T18:17:29.170Z"}}],"cna":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-27T16:27:45.915Z"}}},"related_cves":[{"value":"CVE-2026-100659","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"},"group_id":"advisory:07b242b9-6d9f-4c32-8854-a9e90b4e3d19","priority":{"reasons":[],"severity":"medium","linked_cves":[],"fix_available":false,"known_exploited":false,"publisher_severity":"medium"},"revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100659","advisory_id":"07b242b9-6d9f-4c32-8854-a9e90b4e3d19","event_types":["advisory"],"published_at":"2026-10-24T21:32:12.065237+00:00","technologies":["core-cve","netty"],"context_update":false,"extraction_method":"structured","source_published_at":"2026-09-26T13:23:26.859+00:00","detail_url":"/events/3289"}]}}],"next_after":3277,"next_before":3277}