What is CVE-2026-47692?

CVE-2026-47692 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Improper Handling of Length Parameter Inconsistency. CVSS score: 4.8/10. Published 2026-06-26.

How severe is CVE-2026-47692?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Envoyproxy Envoy

CVE-2026-47692

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, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a…

EPSS: 0.001 (3.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L.

Affected products

Envoyproxy Envoy — versions >= 1.38.0, < 1.38.3, >= 1.37.0, < 1.37.5, >= 1.36.0, < 1.36.9

Weakness classification (CWE)

CWE-130 — Improper Handling of Length Parameter Inconsistency

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-47692?: CVE-2026-47692 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Improper Handling of Length Parameter Inconsistency. CVSS score: 4.8/10. Published 2026-06-26.
How severe is CVE-2026-47692?: Medium severity. CVSS v3 base score is 4.8 out of 10.