CVE-2026-26310

Crash for scoped ip address in Envoy during DNS

State: Published
Severity: 5.9 Medium
Published: Mar 10, 2026
Updated: Mar 10, 2026
Reserved: Feb 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
envoyenvoyproxy	>= 1.37.0, < 1.37.1Affected >= 1.36.0, < 1.36.5Affected >= 1.35.0, < 1.35.9Affected < 1.34.13Affected

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.