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Security Advisories

GO-2026-6089

https://pkg.go.dev/vuln/GO-2026-6089

Severity

Unknown
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Summary

Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http

Description

When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.

  • https://nvd.nist.gov/vuln/detail/CVE-2026-56853
  • https://github.com/advisories/GHSA-xphw-4f88-5f39
  • https://pkg.go.dev/vuln/GO-2026-6089
  • https://go.dev/issue/80205
  • https://go.dev/cl/795540
  • https://groups.google.com/g/golang-announce/c/94pEornpRlI

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