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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-03-10
Last Modified
2026-03-11
Generated
2026-06-16
AI Q&A
2026-03-10
EPSS Evaluated
2026-06-15
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
CWE Icon
KEV
KEV Icon
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.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
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

I don't know

Detection Guidance

I don't know

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.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-26310. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart