Buffer Overflow Vulnerability in Go Programming Language by Google
CVE-2026-46600

Currently unrated

Key Information:

Vendor: Golang.org/x/net
Status: Golang.org/x/net/dns/dnsmessage
Vendor: CVE Published:; 21 July 2026

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What is CVE-2026-46600?

A vulnerability in the Go programming language can lead to a buffer overflow when parsing an invalid SVCB or HTTPS resource record. This occurs when a parameter value exceeds the allocated message buffer size, potentially causing panic and instability in applications utilizing the affected Go versions. Developers should assess their systems for the impacted versions and apply necessary mitigations to prevent exploitation of this issue.

Affected Version(s)

golang.org/x/net/dns/dnsmessage 0 < 0.56.0

References

https://go.dev/cl/786345

https://go.dev/issue/79795

https://pkg.go.dev/vuln/GO-2026-5942

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Timeline

Vulnerability published
Jul 21, 2026
Vulnerability Reserved
May 15, 2026

Credit

Mundur (https://github.com/M0nd0R)

CVE-2026-46600 Data

JSON