{"id":"CVE-2026-73553","title":"Envoy is an open source edge and service proxy designed for cloud-native applications","summary":"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, When ignore_path_parameters_in_path_matching is enabled, Envoy's router strips the semicolon suffix befo…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","cwe":["CWE-436","CWE-863"],"vendor":"envoyproxy","product":"envoy","affected":["envoy < 1.36.10","envoy >= 1.37.0, < 1.37.6","envoy >= 1.38.0, < 1.38.4","envoy >= 1.39.0, < 1.39.1"],"published":"2026-09-21","updated":"2026-09-22","sourceUpdated":"2026-09-22T14:17:14.310","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73553","references":[{"url":"https://github.com/envoyproxy/envoy/commit/0be4a0302ea94a894e470817c2edfbd5ed90d273","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/commit/6a703a375a20e3bf98140ee5f5522c614adee7b6","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/commit/b6ec9b66cc33a415e2fa81a6fa8363cac4772dd1","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/commit/e6d5fe885409ebb335ed3934a167f0bcfea471f2","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.36.10","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.37.6","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.38.4","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.39.1","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73553.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-73553"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512098"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-73553"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73553"},{"url":"https://access.redhat.com/errata/RHSA-2026:65106"},{"url":"https://access.redhat.com/errata/RHSA-2026:65112"},{"url":"https://access.redhat.com/errata/RHSA-2026:65113"},{"url":"https://access.redhat.com/errata/RHSA-2026:65115"},{"url":"https://access.redhat.com/errata/RHSA-2026:65121"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00517,"epssPercentile":0.42988,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T13:20:29.312691Z"},"ingestedAt":"2026-09-21T20:52:58.301Z","patched":["openshift_service_mesh 3.0","openshift_service_mesh 3.1","openshift_service_mesh 3.2","openshift_service_mesh 3.3","openshift_service_mesh 3.4"],"slug":"CVE-2026-73553","body":"## Overview\n\nEnvoy 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, When ignore_path_parameters_in_path_matching is enabled, Envoy's router strips the semicolon suffix before matching but the RBAC url_path matcher evaluates the raw path. A downstream request such as /admin;x can therefore miss a DENY rule for /admin while the router still selects the protected /admin backend. The inconsistent canonicalization allows an unauthenticated client to bypass path-based authorization. The relevant scope boundary is that the route option and a path-based RBAC rule must both be present, and the protected route must match after stripping. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:65106** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.0 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65106)\n- **RHSA-2026:65112** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.1 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65112)\n- **RHSA-2026:65113** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.2 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65113)\n- **RHSA-2026:65115** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.3 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65115)\n- **RHSA-2026:65121** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.4 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65121)","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":209061,"id":"CVE-2026-73553","ts":1790085894796,"field":"exploit_available","old":"false","new":"true"}]}