CVE-2026-26310 MEDIUM

CVE-2026-26310: Crash for scoped ip address in Envoy during DNS

Vendor Envoyproxy
Product envoy
Weakness CWE-20 · Input validation
Published March 10, 2026
Last update March 10, 2026
View on NVD All CVEs

CVSS base score

5.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.

Key dates

02Disclosure timeline

March 10, 2026 CVE published
March 10, 2026 Record updated