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

7.5HIGH

Key Information:

Vendor

Go Standard Library

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

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

net 0 < 1.26.6

net 1.27.0-0 < 1.27.0-rc.3

References

https://go.dev/cl/786345
https://go.dev/issue/79795
https://groups.google.com/g/golang-announce/c/94pEornpRlI

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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