GO-2026-6607

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Source

https://pkg.go.dev/vuln/GO-2026-6607

Import Source

https://vuln.go.dev/ID/GO-2026-6607.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2026-6607

Aliases

CVE-2026-97031

Published

2026-10-08T22:31:09Z

Modified

2026-10-08T22:45:07Z

Summary

Reject malformed ECH outer extension references in crypto/tls

Details

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.

Database specific

{
    "review_status": "REVIEWED",
    "url": "https://pkg.go.dev/vuln/GO-2026-6607"
}

References

Affected packages

Go / stdlib

Package

Name: stdlib; View open source insights on deps.dev
Purl: pkg:golang/stdlib

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.26.9

Introduced

1.27.0-0

Fixed

1.27.2

Ecosystem specific

{
    "imports": [
        {
            "path": "crypto/tls",
            "symbols": [
                "Conn.Handshake",
                "Conn.HandshakeContext",
                "Conn.Read",
                "Conn.Write",
                "Dial",
                "DialWithDialer",
                "Dialer.Dial",
                "Dialer.DialContext",
                "QUICConn.Start",
                "decodeInnerClientHello"
            ]
        }
    ]
}

Database specific

source

"https://vuln.go.dev/ID/GO-2026-6607.json"