GO-2025-4008

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Source
https://pkg.go.dev/vuln/GO-2025-4008
Import Source
https://vuln.go.dev/ID/GO-2025-4008.json
JSON Data
https://api.test.osv.dev/v1/vulns/GO-2025-4008
Aliases
Downstream
Related
Published
2025-10-29T21:49:53Z
Modified
2026-07-17T21:00:30Z
Summary
ALPN negotiation error contains attacker controlled information in crypto/tls
Details

When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.

Database specific 
{
    "review_status":  "REVIEWED",
    "url":  "https://pkg.go.dev/vuln/GO-2025-4008"
}
References
Credits
    • National Cyber Security Centre Finland

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
1.24.8
Introduced
1.25.0
Fixed
1.25.2

Ecosystem specific 

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

Database specific

source 
"https://vuln.go.dev/ID/GO-2025-4008.json"