CVE-2026-26310 — Improper Input Validation in Envoy

CWE-20 — Improper Input Validation9 documents5 sources
Severity
7.5HIGHNVD
CNA5.9
EPSS
0.0%
top 99.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Envoyproxy EnvoyGithub.com Envoyproxy Envoy
Timeline
PublishedMar 10

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶CVEListV5envoyproxy/envoy< 1.34.13+3
▶NVDenvoyproxy/envoy1.35.0 — 1.35.8+3
▶Gogithub.com/envoyproxy_envoy1.36.0 — 1.36.4+2

🔴Vulnerability Details

3
CVEList
Crash for scoped ip address in Envoy during DNS↗2026-03-10
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OSV
Envoy vulnerable to crash for scoped ip address during DNS↗2026-03-10
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GHSA
Envoy vulnerable to crash for scoped ip address during DNS↗2026-03-10
▶

🕵️Threat Intelligence

5
Wiz
CVE-2026-26308 Impact, Exploitability, and Mitigation Steps | Wiz↗
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Wiz
CVE-2026-26310 Impact, Exploitability, and Mitigation Steps | Wiz↗
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Wiz
CVE-2026-26311 Impact, Exploitability, and Mitigation Steps | Wiz↗
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Wiz
CVE-2026-26309 Impact, Exploitability, and Mitigation Steps | Wiz↗
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Wiz
CVE-2026-26330 Impact, Exploitability, and Mitigation Steps | Wiz↗
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