{"id":"CVE-2026-33805","sourceIdentifier":"ce714d77-add3-4f53-aff5-83d477b104bb","published":"2026-04-15T11:16:34.990","lastModified":"2026-10-26T22:10:00.163","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them in the Connection header value. Any header added by the proxy for routing, access control, or security purposes can be selectively removed by a client. @fastify/http-proxy is also affected as it delegates to @fastify/reply-from. \n\nUpgrade to @fastify/reply-from v12.6.2 or @fastify/http-proxy v11.4.4 or later."},{"lang":"es","value":"@fastify/reply-from v12.6.1 y anteriores y @fastify/http-proxy v11.4.3 y anteriores procesan el encabezado Connection del cliente después de que el proxy ha añadido sus propios encabezados a través de rewriteRequestHeaders. Esto permite a los atacantes eliminar retroactivamente los encabezados añadidos por el proxy de las solicitudes ascendentes al listarlos en el valor del encabezado Connection. Cualquier encabezado añadido por el proxy para fines de enrutamiento, control de acceso o seguridad puede ser eliminado selectivamente por un cliente. @fastify/http-proxy también se ve afectado ya que delega en @fastify/reply-from.\n\nActualice a @fastify/reply-from v12.6.2 o @fastify/http-proxy v11.4.4 o posterior."}],"affected":[{"source":"ce714d77-add3-4f53-aff5-83d477b104bb","affectedData":[{"vendor":"@fastify/reply-from","product":"@fastify/reply-from","defaultStatus":"unaffected","packageURL":"pkg:npm/@fastify/reply-from","versions":[{"version":"0","lessThan":"12.6.2","versionType":"semver","status":"affected"},{"version":"12.6.2","versionType":"semver","status":"unaffected"}]},{"vendor":"@fastify/reply-from","product":"@fastify/http-proxy","defaultStatus":"unaffected","packageURL":"pkg:npm/@fastify/http-proxy","versions":[{"version":"0","lessThan":"11.4.4","versionType":"semver","status":"affected"},{"version":"11.4.4","versionType":"semver","status":"unaffected"}]}]},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","affectedData":[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces 3.27","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"devspaces/dashboard-rhel9","cpes":["cpe:/a:redhat:openshift_devspaces:3.27::el9"],"versions":[{"version":"1776795511","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhoai/odh-dashboard-rhel8","cpes":["cpe:/a:redhat:openshift_ai"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhoai/odh-dashboard-rhel9","cpes":["cpe:/a:redhat:openshift_ai"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhoai/odh-mod-arch-gen-ai-rhel9","cpes":["cpe:/a:redhat:openshift_ai"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhoai/odh-mod-arch-maas-rhel9","cpes":["cpe:/a:redhat:openshift_ai"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhoai/odh-mod-arch-model-registry-rhel9","cpes":["cpe:/a:redhat:openshift_ai"]}]}],"metrics":{"cvssMetricV40":[{"source":"ce714d77-add3-4f53-aff5-83d477b104bb","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/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","baseScore":9.0,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":4.0},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-15T13:08:08.503908Z","id":"CVE-2026-33805","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA 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Advisory"]},{"url":"https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-gwhp-pf74-vj37","source":"ce714d77-add3-4f53-aff5-83d477b104bb","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:10175","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-33805","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458651","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-gwhp-pf74-vj37","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33805.json","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}]}