CVE-2026-73547

{"id": "CVE-2026-73547", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73547", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-22T14:15:38.926679Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "envoyproxy", "product": "envoy", "versions": [{"status": "affected", "version": "< 1.36.10"}, {"status": "affected", "version": ">= 1.37.0, < 1.37.6"}, {"status": "affected", "version": ">= 1.38.0, < 1.38.4"}, {"status": "affected", "version": ">= 1.39.0, < 1.39.1"}]}]}], "published": "2026-09-21T20:17:28.230", "references": [{"url": "https://github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e643c5d117ffe4", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38820f3e9271fe", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee33470d4c7afb7e98", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89afc03d3e71929", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-pg6r", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_parameters_to_remove from an authorization response. A path-less CONNECT request makes request_headers_->Path() return null, and Filter::onComplete dereferences that pointer while parsing the query string. An unauthenticated downstream client can crash the Envoy process when the filter and authorization response use query-parameter mutation. The relevant scope boundary is that the deployment must accept path-less CONNECT and configure ext_authz query-parameter mutation. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1."}], "lastModified": "2026-10-06T15:34:36.113", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6A420B14-9ADA-4F6B-ACAA-3045E8690F04", "versionEndExcluding": "1.36.10"}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1AD376F3-22D7-4BFB-B00C-BD68F464436F", "versionEndExcluding": "1.37.6", "versionStartIncluding": "1.37.0"}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "840E030F-8746-4DBD-87C0-5DF7896294CC", "versionEndExcluding": "1.38.4", "versionStartIncluding": "1.38.0"}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B5C1C594-8142-4F51-BE50-1AF50FD07129", "versionEndExcluding": "1.39.1", "versionStartIncluding": "1.39.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}