What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-05 · updated 2026-06-17

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.

Affected products

• Go standard library net/http: before 1.21.8; from 1.22.0-0 before 1.22.1 — fixed in 1.21.8, 1.22.1
• Go standard library net/http/cookiejar: before 1.21.8; from 1.22.0-0 before 1.22.1 — fixed in 1.21.8, 1.22.1

How to fix

Upgrade to a fixed version: Go standard library net/http 1.21.8, 1.22.1; Go standard library net/http/cookiejar 1.21.8, 1.22.1. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2024/03/08/4
• https://go.dev/cl/569340
• https://go.dev/issue/65065
• 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
• https://go.dev/cl/569340
• https://go.dev/issue/65065
• 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/

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