| id: GO-2026-6089 |
| modules: |
| - module: std |
| versions: |
| - fixed: 1.25.13 |
| - introduced: 1.26.0-0 |
| - fixed: 1.26.6 |
| - introduced: 1.27.0-0 |
| - fixed: 1.27.0-rc.3 |
| vulnerable_at: 1.27.0-rc.2 |
| packages: |
| - package: net/http |
| symbols: |
| - conn.readRequest |
| - conn.serve |
| derived_symbols: |
| - ListenAndServe |
| - ListenAndServeTLS |
| - Serve |
| - ServeTLS |
| - Server.ListenAndServe |
| - Server.ListenAndServeTLS |
| - Server.Serve |
| - Server.ServeTLS |
| 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. |
| references: |
| - report: https://go.dev/issue/80205 |
| - fix: https://go.dev/cl/795540 |
| - web: https://groups.google.com/g/golang-announce/c/94pEornpRlI |
| cve_metadata: |
| id: CVE-2026-56853 |
| cwe: 'CWE-770: Allocation of Resources Without Limits or Throttling' |
| source: |
| id: go-security-team |
| review_status: REVIEWED |
