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CVE-2022-41717 An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests

Description

An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests. HTTP/2 server connections contain a cache of HTTP header keys sent by the client. While the total number of entries in this cache is capped, an attacker sending very large keys can cause the server to allocate approximately 64 MiB per open connection.

Affected products and versions

Product Affected versions Fixed in
net/http 1.19 1.19.0-0 → < 1.19.4 1.19.4
net/http 1.18 earliest → < 1.18.9 1.18.9
golang.org/x/net/http2 0.4 earliest → < 0.4.0 0.4.0

References

Timeline

  1. Published
  2. Last modified

Other CVEs of net/http

The 26 CVEs of net/http →
CVE-2026-97032 HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently 7.5 High CVE-2026-78663 The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream… 9.1 Critical CVE-2026-78669 A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams… 7.5 High CVE-2026-78667 When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS)… 7.5 High
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