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CVE-2026-97031 Details

Description

Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://go.dev/cl/847312	[email protected]
https://go.dev/issue/81855	[email protected]
https://groups.google.com/g/golang-announce/c/U2fTuyDJznI	[email protected]
https://pkg.go.dev/vuln/GO-2026-6607	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-405	Asymmetric Resource Consumption (Amplification)	CISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 9, 2026	CVE Modified	CISA-ADP
Oct 8, 2026	New CVE Received	[email protected]