What is CVE-2026-46600?

CVE-2026-46600 is a high-severity vulnerability in Golang.org/x/net Golang.org/x/net/dns/dnsmessage, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-07-21.

How severe is CVE-2026-46600?

High severity. CVSS v3 base score is 7.5 out of 10.

Out-of-bounds Read in Golang.org/x/net Golang.org/x/net/dns/dnsmessage

CVE-2026-46600

Parsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer.

Vulnerability class: Buffer Overflow

EPSS: 0.005 (43.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Golang.org/x/net Golang.org/x/net/dns/dnsmessage — versions 0
Go Standard Library Net — versions 1.27.0-0, 1.26.0-0, 0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

security@golang.org
security@golang.org
security@golang.org
security@golang.org

Frequently asked questions

What is CVE-2026-46600?: CVE-2026-46600 is a high-severity vulnerability in Golang.org/x/net Golang.org/x/net/dns/dnsmessage, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-07-21.
How severe is CVE-2026-46600?: High severity. CVSS v3 base score is 7.5 out of 10.