CVE-2026-46600
Parsing an invalid SVCB or HTTPS RR can panic in golang.org/x/net/dns/dnsmessage
Description
Parsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer.
INFO
Published Date :
July 21, 2026, 8:17 p.m.
Last Modified :
July 21, 2026, 8:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-46600
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update to a version that corrects SVCB/HTTPS RR parsing.
- Ensure input data integrity for RRs.
- Implement robust error handling for RR parsing.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-46600.
| URL | Resource |
|---|---|
| https://go.dev/cl/786345 | |
| https://go.dev/issue/79795 | |
| https://pkg.go.dev/vuln/GO-2026-5942 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46600 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46600
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-46600 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46600 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'golang.org/x/net', 'product': 'golang.org/x/net/dns/dnsmessage', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.56.0', 'versionType': 'semver'}], 'packageName': 'golang.org/x/net/dns/dnsmessage', 'collectionURL': 'https://pkg.go.dev', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': 'unpackSVCBResource'}, {'name': 'Message.Unpack'}, {'name': 'Parser.Additional'}, {'name': 'Parser.AllAdditionals'}, {'name': 'Parser.AllAnswers'}, {'name': 'Parser.AllAuthorities'}, {'name': 'Parser.Answer'}, {'name': 'Parser.Authority'}, {'name': 'Parser.HTTPSResource'}, {'name': 'Parser.SVCBResource'}]}] Added Description Parsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer. Added Reference https://go.dev/cl/786345 Added Reference https://go.dev/issue/79795 Added Reference https://pkg.go.dev/vuln/GO-2026-5942