GO-2026-6610

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Source

https://pkg.go.dev/vuln/GO-2026-6610

Import Source

https://vuln.go.dev/ID/GO-2026-6610.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2026-6610

Aliases

CVE-2026-78660

Published

2026-10-08T22:31:09Z

Modified

2026-10-08T23:00:13Z

Summary

HTTP/2 transport accepts malformed framing-related headers in net/http

Details

Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling.

Database specific

{
    "review_status": "REVIEWED",
    "url": "https://pkg.go.dev/vuln/GO-2026-6610"
}

References

Credits

- TJ Barton

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

Ecosystem specific

{
    "imports": [
        {
            "path": "net/http",
            "symbols": [
                "Client.CloseIdleConnections",
                "Client.Do",
                "Client.Get",
                "Client.Head",
                "Client.Post",
                "Client.PostForm",
                "ClientConn.Close",
                "ClientConn.RoundTrip",
                "Get",
                "Head",
                "Post",
                "PostForm",
                "Transport.CloseIdleConnections",
                "Transport.NewClientConn",
                "Transport.RoundTrip",
                "http1ClientConn.Close",
                "http1ClientConn.RoundTrip",
                "http2Transport.NewClientConn",
                "http2Transport.RoundTrip",
                "http2Transport.RoundTripOpt",
                "http2clientConnPool.GetClientConn",
                "http2clientConnReadLoop.handleResponse",
                "http2noDialClientConnPool.GetClientConn",
                "http2noDialH2RoundTripper.NewClientConn",
                "http2noDialH2RoundTripper.RoundTrip",
                "http2unencryptedTransport.RoundTrip"
            ]
        }
    ]
}

Database specific

source

"https://vuln.go.dev/ID/GO-2026-6610.json"

Go / stdlib

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

1.27.0-0

Fixed

1.27.2

Ecosystem specific

{
    "imports": [
        {
            "path": "net/http/internal/http2",
            "symbols": [
                "Transport.AddConn",
                "Transport.NewClientConn",
                "Transport.RoundTrip",
                "Transport.RoundTripOpt",
                "clientConnPool.GetClientConn",
                "clientConnReadLoop.handleResponse",
                "noDialClientConnPool.GetClientConn"
            ]
        }
    ]
}

Database specific

source

"https://vuln.go.dev/ID/GO-2026-6610.json"

Go / golang.org/x/net

Package

Name: golang.org/x/net; View open source insights on deps.dev
Purl: pkg:golang/golang.org/x/net

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.60.0

Ecosystem specific

{
    "imports": [
        {
            "path": "golang.org/x/net/http2",
            "symbols": [
                "Transport.NewClientConn",
                "Transport.RoundTrip",
                "Transport.RoundTripOpt",
                "clientConnPool.GetClientConn",
                "clientConnReadLoop.handleResponse",
                "noDialClientConnPool.GetClientConn",
                "noDialH2RoundTripper.NewClientConn",
                "noDialH2RoundTripper.RoundTrip",
                "unencryptedTransport.RoundTrip"
            ]
        }
    ]
}

Database specific

source

"https://vuln.go.dev/ID/GO-2026-6610.json"