Vulnerability Report: GO-2026-4981
- CVE-2026-33811
- Affects: net
- Published: May 07, 2026
When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
Affected Packages
-
PathVersionsSymbols
-
before go1.25.10, from go1.26.0-0 before go1.26.3
Aliases
References
- https://go.dev/issue/78803
- https://go.dev/cl/767860
- https://groups.google.com/g/golang-announce/c/qcCIEXso47M
- https://vuln.go.dev/ID/GO-2026-4981.json
Credits
- hamayanhamayan
Feedback
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