CVE-2026-26310

MEDIUM
2026-03-10 [email protected] GHSA-3cw6-2j68-868p
5.9
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Mar 11, 2026 - 16:09 vuln.today
Public exploit code
CVE Published
Mar 10, 2026 - 20:16 nvd
MEDIUM 5.9

Tags

Dns Denial Of Service Envoy

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.

Analysis

Envoy proxy versions prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13 crash when processing scoped IPv6 addresses through the Utility::getAddressWithPort function, which is invoked by the original_src and dns filters in the data plane. This denial of service vulnerability can be triggered remotely without authentication, and public exploit code exists. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +30
POC: +20

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CVE-2026-26310 vulnerability details – vuln.today
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