CVE-2026-26310
Received Received - Intake

Crash Vulnerability in Envoy IPv6 Utility Causes Denial of Service

Publication date: 2026-03-10

Last updated on: 2026-03-11

Assigner: GitHub, Inc.

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.

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Meta Information

Published
2026-03-10
Last Modified
2026-03-11
Generated
2026-07-06
AI Q&A
2026-03-10
EPSS Evaluated
2026-07-05
NVD
CVE-2026-26310
EUVD
EUVD-2026-10802

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
envoyproxy envoy to 1.34.13 (exc)
envoyproxy envoy From 1.35.0 (inc) to 1.35.8 (exc)
envoyproxy envoy From 1.36.0 (inc) to 1.36.5 (exc)
envoyproxy envoy 1.37.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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Executive Summary

This vulnerability exists in Envoy, a high-performance edge/middle/service proxy. Prior to versions 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling the function Utility::getAddressWithPort with scoped IPv6 addresses causes the application to crash. This function is used in the data plane by the original_src filter and the dns filter.

Impact Analysis

The vulnerability can cause the Envoy proxy to crash when processing scoped IPv6 addresses, leading to a denial of service (DoS) condition. This can disrupt network traffic and service availability since Envoy is often used as a critical component in service mesh and edge proxy deployments.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

To mitigate this vulnerability, you should upgrade Envoy to one of the fixed versions: 1.37.1, 1.36.5, 1.35.8, or 1.34.13.

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