GO-2026-6090

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Source
https://pkg.go.dev/vuln/GO-2026-6090
Import Source
https://vuln.go.dev/ID/GO-2026-6090.json
JSON Data
https://api.osv.dev/v1/vulns/GO-2026-6090
Aliases
  • CVE-2026-56862
Downstream
Related
Published
2026-08-13T21:43:54Z
Modified
2026-08-14T15:42:06.998246220Z
Summary
Limit handshake messages we are willing to accept post-handshake in crypto/tls
Details

Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.

Database specific 
{
    "url": "https://pkg.go.dev/vuln/GO-2026-6090",
    "review_status": "REVIEWED"
}
References
Credits
    • Qi Deng of Aurascape.ai

Affected packages

Go / stdlib

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.25.13
Introduced
1.26.0-0
Fixed
1.26.6
Introduced
1.27.0-0
Fixed
1.27.0-rc.3

Ecosystem specific 

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

Database specific

source 
"https://vuln.go.dev/ID/GO-2026-6090.json"