What is CVE-2026-48706?

CVE-2026-48706 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.9/10. Published 2026-06-26.

How severe is CVE-2026-48706?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Buffer overflow in Envoyproxy Envoy

CVE-2026-48706

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, a vulnerability exists in Envoy's TCP StatsD sink (TcpStatsdSink), where the thread-local flusher…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

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-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-48706?: CVE-2026-48706 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.9/10. Published 2026-06-26.
How severe is CVE-2026-48706?: Medium severity. CVSS v3 base score is 5.9 out of 10.