GO-2026-4947

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Source

https://pkg.go.dev/vuln/GO-2026-4947

Import Source

https://vuln.go.dev/ID/GO-2026-4947.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2026-4947

Aliases

CVE-2026-32280

Published

2026-04-07T22:53:49Z

Modified

2026-04-08T01:15:46.261080Z

Summary

Unexpected work during chain building in crypto/x509

Details

During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls.

Database specific

{
    "review_status": "REVIEWED",
    "url": "https://pkg.go.dev/vuln/GO-2026-4947"
}

References

Credits

- Jakub Ciolek - https://ciolek.dev

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

1.25.9

Introduced

1.26.0-0

Fixed

1.26.2

Ecosystem specific

{
    "imports": [
        {
            "path": "crypto/x509",
            "symbols": [
                "Certificate.Verify",
                "Certificate.buildChains"
            ]
        }
    ]
}

Database specific

source

"https://vuln.go.dev/ID/GO-2026-4947.json"