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CVE-2026-27138

MEDIUM

5.9

Description

Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS.

CVE Details

CVSS v3.1 Score5.9

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published3/6/2026

Last Modified3/10/2026

Sourcenvd

Honeypot Sightings0

References

https://go.dev/cl/752183(security@golang.org)

https://go.dev/issue/77953(security@golang.org)

https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk(security@golang.org)

https://pkg.go.dev/vuln/GO-2026-4600(security@golang.org)

IOC Correlations

No correlations recorded

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