Vulnerability Report

CVE-2026-47207

Title: Envoy ext_proc server use-after-free

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-47207.

CWE Category CWE-416

Published Date Jun 26, 2026

Modified Date Jun 27, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.44%

Vulnerability Summary

CVE-2026-47207: 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.

Impacted Vendors

enphase 1

envoyproxy 1

Reference Links

https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-47207 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 27, 2026 MODIFIED

Vulnerability data updated via NVD.

June 26, 2026 MODIFIED

Vulnerability data updated via NVD.

June 26, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.