Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
envoyproxy envoy — Envoy crashes if multiple unexpected ext_proc responses are packed into one gRPC message
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N U N N H 6.5 .0029 21.9 —
AFFECTED
Product Versions Fixed
envoy >= 1.38.0, < 1.38.3 – —
TIMELINE
May 18 Reserved by GitHub_M
Jun 26 EXPLOIT PUBLISHED — CVE-2026-47207 (envoyproxy envoy). Public exploit reference added.
Jun 26 Published (CNA: GitHub_M)
Description
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. This can occur when the first response in the batch causes the gRPC stream object to be destroyed, leading to a use-after-free error when Envoy attempts to process subsequent responses in the same gRPC message. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| May 18, 2026 | Reserved | Reserved by GitHub_M |
| June 26, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-47207 (envoyproxy envoy). Public exploit reference added. |
| June 26, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| envoyproxy | envoy | — | >= 1.38.0, < 1.38.3 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-47207 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 Wednesday, August 19, 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.