CVE-2025-4673

Sensitive headers not cleared on cross-origin redirect in net/http

Description

Proxy-Authorization and Proxy-Authenticate headers persisted on cross-origin redirects potentially leaking sensitive information.

6.8

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.03%

Affected: Go standard library net/http

References

Link	Tags
https://go.dev/cl/679257
https://go.dev/issue/73816
https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A
https://pkg.go.dev/vuln/GO-2025-3751

Frequently Asked Questions

What is the severity of CVE-2025-4673?: CVE-2025-4673 has been scored as a medium severity vulnerability.
How to fix CVE-2025-4673?: To fix CVE-2025-4673, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-4673 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-4673 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-4673?: CVE-2025-4673 affects Go standard library net/http.

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