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

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Summary

CVECVE-2026-46600
StatePUBLISHED
AssignerGo
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-21 20:17:01 UTC
Updated2026-07-21 20:17:01 UTC
DescriptionParsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer.

Risk And Classification

Problem Types: CWE-125: Out-of-bounds Read

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Golang.orgxnet Golang.org/x/net/dns/dnsmessage affected 0.56.0 semver Not specified

References

ReferenceSourceLinkTags
pkg.go.dev/vuln/GO-2026-5942 [email protected] pkg.go.dev
go.dev/issue/79795 [email protected] go.dev
go.dev/cl/786345 [email protected] go.dev
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

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

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