Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U N N H 7.5 .0055 44.5 —
AFFECTED Product Versions Fixed envoy < 1.36.10 – —
TIMELINE Aug 12 Reserved by GitHub_M Sep 21 Published (CNA: GitHub_M) Oct 6 EXPLOIT PUBLISHED — CVE-2026-73547 (envoyproxy envoy). Public exploit reference added.
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.
| Date | Event | Detail |
|---|---|---|
| August 12, 2026 | Reserved | Reserved by GitHub_M |
| September 21, 2026 | Published | Published (CNA: GitHub_M) |
| October 6, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-73547 (envoyproxy envoy). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| envoyproxy | envoy | — | < 1.36.10 | — |
Authoritative record: CVE-2026-73547 at cve.org
Vendors: envoyproxy
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-73547 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
