Vulnerability in Go standard library net/http

[ Description ]Official description

A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund8 Oct 2026WID-SEC-2026-3841

  Golang Go: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-94439CVE-2026-56866CVE-2026-94447+12 more CVEs

[ References ]References

• go.dev/cl/847186
• go.dev/cl/847308
• go.dev/issue/81742
• groups.google.com/g/golang-announce/c/U2fTuyDJznI
• groups.google.com/g/golang-announce/c/ZPwCyRUuGBs
• pkg.go.dev/vuln/GO-2026-6611