CVE-2026-46600

Parsing an invalid SVCB or HTTPS RR can panic in golang.org/x/net/dns/dnsmessage

HIGH

7.5

CVSS Score

Published: July 21, 2026 at 07:18 PM UTC

Updated: October 24, 2026 at 07:10 PM UTC

2 products affected across 2 vendors.NETDNS Dnsmessage

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Severity

HIGH7.5

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

.NET · Go Standard Librarygo

90%

1.26.0-0 ≤ v < 1.26.61.27.0-0 ≤ v < 1.27.0-rc.31.26.0-0 1.27.0-0

Affected range stops below 1.26.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.27.0-rc.3, so it looks safe — our inference, not a vendor statement

DNS Dnsmessage · Golang Org X .NETgo

90%

0 ≤ v < 0.56.00

Affected range stops below 0.56.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

Source: cverecord

https://go.dev/cl/786345

Source: cverecord

https://go.dev/issue/79795

Source: cverecord

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

Source: cverecord

https://groups.google.com/g/golang-announce/c/94pEornpRlI

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-125

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