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CVE-2026-26310

Crash for scoped ip address in Envoy during DNS

Published: Mar 10, 2026Updated: Mar 11, 2026 Sources: CVE List NVD GHSACWE-20
NVD MITRE
5.9CVSSMEDIUM
EPSS Score
0.4%
Top 69.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-20NVD-CWE-noinfo

Affected Products

envoyenvoyproxy
On-prem
Cloud & SaaS / api-gateway
github.com/envoyproxy/envoyGoOSS Libraries
envoyproxyoss-projectUSCloud & SaaSaka envoy proxy, envoy
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-26310
nvd.nist.gov
https://github.com/envoyproxy/envoy
github.com

Timeline

Published
Mar 10, 2026
Last Updated
Mar 11, 2026

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