GO-2026-4337

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Source

https://pkg.go.dev/vuln/GO-2026-4337

Import Source

https://vuln.go.dev/ID/GO-2026-4337.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2026-4337

Aliases

CVE-2025-68121

Published

2026-02-05T17:23:09Z

Modified

2026-02-05T18:11:18.077689Z

Summary

Unexpected session resumption in crypto/tls

Details

During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.

Database specific

{
    "url": "https://pkg.go.dev/vuln/GO-2026-4337",
    "review_status": "REVIEWED"
}

References

Credits

- Coia Prant (github.com/rbqvq)
- Go Security Team

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

1.24.13

Introduced

1.25.0-0

Fixed

1.25.7

Introduced

1.26.0-rc.1

Fixed

1.26.0-rc.3

Ecosystem specific

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

Database specific

source

"https://vuln.go.dev/ID/GO-2026-4337.json"