{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-118264", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-27T20:13:55.314Z", "datePublished": "2026-10-28T19:03:01.533Z", "dateUpdated": "2026-10-30T19:21:07.156Z"}, "containers": {"cna": {"title": "Echo: Rejected WebSocket upgrades can bypass Echo route-level access controls", "problemTypes": [{"descriptions": [{"cweId": "CWE-444", "lang": "en", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/labstack/echo/security/advisories/GHSA-cxf3-9h37-7rr8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/labstack/echo/security/advisories/GHSA-cxf3-9h37-7rr8"}, {"name": "https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec"}, {"name": "https://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f"}, {"name": "https://github.com/labstack/echo/releases/tag/v4.16.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/releases/tag/v4.16.1"}, {"name": "https://github.com/labstack/echo/releases/tag/v5.4.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/releases/tag/v5.4.1"}], "affected": [{"vendor": "labstack", "product": "echo", "versions": [{"version": ">= 4.0.0, < 4.16.1", "status": "affected"}, {"version": ">= 5.0.0, < 5.4.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T19:03:01.533Z"}, "descriptions": [{"lang": "en", "value": "Echo is a Go web framework. From 4.0.0 until 4.16.1 and 5.4.1, Echo's Proxy middleware selects a raw tunnel from a client WebSocket upgrade request before verifying that the configured upstream accepted the upgrade. If the upstream rejects the upgrade with an ordinary keep-alive response, later HTTP requests on the connection are sent directly to that upstream without passing through Echo's router or route-specific middleware. This can bypass authentication or authorization enforced only by Echo routes, but requires an accessible proxy route, a cooperating rejected-upgrade response, and a target without independent upstream authorization. This issue is fixed in 4.16.1 and 5.4.1."}], "source": {"advisory": "GHSA-cxf3-9h37-7rr8", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-30T19:20:57.948930Z", "id": "CVE-2026-118264", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-30T19:21:07.156Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-118264", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-30T19:20:57.948930Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-30T19:21:02.568Z"}}], "cna": {"title": "Echo: Rejected WebSocket upgrades can bypass Echo route-level access controls", "source": {"advisory": "GHSA-cxf3-9h37-7rr8", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "labstack", "product": "echo", "versions": [{"status": "affected", "version": ">= 4.0.0, < 4.16.1"}, {"status": "affected", "version": ">= 5.0.0, < 5.4.1"}]}], "references": [{"url": "https://github.com/labstack/echo/security/advisories/GHSA-cxf3-9h37-7rr8", "name": "https://github.com/labstack/echo/security/advisories/GHSA-cxf3-9h37-7rr8", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec", "name": "https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f", "name": "https://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/labstack/echo/releases/tag/v4.16.1", "name": "https://github.com/labstack/echo/releases/tag/v4.16.1", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/labstack/echo/releases/tag/v5.4.1", "name": "https://github.com/labstack/echo/releases/tag/v5.4.1", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "Echo is a Go web framework. From 4.0.0 until 4.16.1 and 5.4.1, Echo's Proxy middleware selects a raw tunnel from a client WebSocket upgrade request before verifying that the configured upstream accepted the upgrade. If the upstream rejects the upgrade with an ordinary keep-alive response, later HTTP requests on the connection are sent directly to that upstream without passing through Echo's router or route-specific middleware. This can bypass authentication or authorization enforced only by Echo routes, but requires an accessible proxy route, a cooperating rejected-upgrade response, and a target without independent upstream authorization. This issue is fixed in 4.16.1 and 5.4.1."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-444", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T19:03:01.533Z"}}}, "cveMetadata": {"cveId": "CVE-2026-118264", "state": "PUBLISHED", "dateUpdated": "2026-10-30T19:21:07.156Z", "dateReserved": "2026-10-27T20:13:55.314Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-10-28T19:03:01.533Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "echo", "vendor": "labstack", "versions": [{"status": "affected", "version": ">= 4.0.0, < 4.16.1"}, {"status": "affected", "version": ">= 5.0.0, < 5.4.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Echo is a Go web framework. From 4.0.0 until 4.16.1 and 5.4.1, Echo's Proxy middleware selects a raw tunnel from a client WebSocket upgrade request before verifying that the configured upstream accepted the upgrade. If the upstream rejects the upgrade with an ordinary keep-alive response, later HTTP requests on the connection are sent directly to that upstream without passing through Echo's router or route-specific middleware. This can bypass authentication or authorization enforced only by Echo routes, but requires an accessible proxy route, a cooperating rejected-upgrade response, and a target without independent upstream authorization. This issue is fixed in 4.16.1 and 5.4.1."}, {"lang": "es", "value": "Echo es un framework web de Go. Desde la versi\u00f3n 4.0.0 hasta la 4.16.1 y la 5.4.1, el middleware Proxy de Echo selecciona un t\u00fanel sin procesar de una solicitud de actualizaci\u00f3n de WebSocket del cliente antes de verificar que el upstream configurado acept\u00f3 la actualizaci\u00f3n. Si el upstream rechaza la actualizaci\u00f3n con una respuesta keep-alive ordinaria, las solicitudes HTTP posteriores en la conexi\u00f3n se env\u00edan directamente a ese upstream sin pasar por el router de Echo o el middleware espec\u00edfico de la ruta. Esto puede eludir la autenticaci\u00f3n o autorizaci\u00f3n impuestas \u00fanicamente por las rutas de Echo, pero requiere una ruta de proxy accesible, una respuesta de actualizaci\u00f3n rechazada cooperativa y un objetivo sin autorizaci\u00f3n upstream independiente. Este problema se corrige en las versiones 4.16.1 y 5.4.1."}], "id": "CVE-2026-118264", "lastModified": "2026-11-04T23:10:00.223", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-118264", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-30T19:20:57.948930Z", "version": "2.0.3"}}]}, "published": "2026-10-28T19:17:31.237", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec"}, {"source": "security-advisories@github.com", "url": "https://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f"}, {"source": "security-advisories@github.com", "url": "https://github.com/labstack/echo/releases/tag/v4.16.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/labstack/echo/releases/tag/v5.4.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/labstack/echo/security/advisories/GHSA-cxf3-9h37-7rr8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}, {"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "github.com/labstack/echo: Echo: Rejected WebSocket upgrades can bypass Echo route-level access controls", "id": "2563120", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2563120"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-444", "details": ["Echo is a Go web framework. From 4.0.0 until 4.16.1 and 5.4.1, Echo's Proxy middleware selects a raw tunnel from a client WebSocket upgrade request before verifying that the configured upstream accepted the upgrade. If the upstream rejects the upgrade with an ordinary keep-alive response, later HTTP requests on the connection are sent directly to that upstream without passing through Echo's router or route-specific middleware. This can bypass authentication or authorization enforced only by Echo routes, but requires an accessible proxy route, a cooperating rejected-upgrade response, and a target without independent upstream authorization. This issue is fixed in 4.16.1 and 5.4.1.", "A flaw was found in Echo's Proxy middleware. When a client requests a WebSocket upgrade, the middleware establishes a direct network tunnel before verifying whether the upstream server accepted the upgrade. If the upstream server rejects the upgrade while keeping the connection alive, subsequent HTTP requests sent over that connection bypass Echo's routing and route-specific middleware. A remote attacker can exploit this flaw to gain unauthorized access to protected upstream resources that rely solely on Echo for access control."], "mitigation": {"lang": "en:us", "value": "Disable or avoid using the Proxy middleware for WebSocket upgrade paths until a patched version is deployed, or enforce independent authentication and authorization directly at the upstream service layer."}, "name": "CVE-2026-118264", "package_state": [{"cpe": "cpe:/a:redhat:ansible_automation_orchestrator:2026.8", "fix_state": "Affected", "package_name": "ansible-automation-platform/automation-orchestrator-temporal-rhel9", "product_name": "Ansible Automation Orchestrator 2026"}, {"cpe": "cpe:/a:redhat:cost_management_on_premise:1", "fix_state": "Affected", "package_name": "costmanagement/costmanagement-ros-ocp-backend-rhel9", "product_name": "Cost Management On Premise"}, {"cpe": "cpe:/a:redhat:multicluster_globalhub", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "product_name": "Multicluster Global Hub"}, {"cpe": "cpe:/a:redhat:multicluster_globalhub:5", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "product_name": "Multicluster Global Hub 5"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/acm-grafana-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/acm-multicluster-observability-addon-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:ceph_storage:5", "fix_state": "Fix deferred", "package_name": "rhceph/rhceph-5-dashboard-rhel8", "product_name": "Red Hat Ceph Storage 5"}, {"cpe": "cpe:/a:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/a:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "osbuild-composer", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/a:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "osbuild-composer", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "osbuild-composer", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/hyperconverged-cluster-operator-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/hyperconverged-cluster-webhook-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:5", "fix_state": "Affected", "package_name": "container-native-virtualization/hyperconverged-cluster-operator-rhel9", "product_name": "Red Hat OpenShift Virtualization 5"}], "public_date": "2026-10-28T19:03:01Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-118264\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-118264\nhttps://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec\nhttps://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f\nhttps://github.com/labstack/echo/releases/tag/v4.16.1\nhttps://github.com/labstack/echo/releases/tag/v5.4.1\nhttps://github.com/labstack/echo/security/advisories/GHSA-cxf3-9h37-7rr8"], "statement": "A flaw was found in the Echo Go web framework's Proxy middleware. When processing a client WebSocket upgrade request, the middleware establishes a raw tunnel before verifying that the upstream server accepted the upgrade. If the upstream rejects the upgrade with a standard keep-alive response, subsequent HTTP requests over the existing connection bypass Echo's router and route-specific middleware, allowing unauthenticated or unauthorized access to upstream resources that rely solely on Echo for access control.", "threat_severity": "Moderate"}