What’s Vulnerable › Vulnerabilities

CVE-2022-2880: Incorrect sanitization of forwarded query parameters in net/http/httputil

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-10-14 · updated 2026-06-17
• Weakness: CWE-444

Description

Requests forwarded by ReverseProxy include the raw query parameters from the inbound request, including unparsable parameters rejected by net/http. This could permit query parameter smuggling when a Go proxy forwards a parameter with an unparsable value. After fix, ReverseProxy sanitizes the query parameters in the forwarded query when the outbound request's Form field is set after the ReverseProxy. Director function returns, indicating that the proxy has parsed the query parameters. Proxies which do not parse query parameters continue to forward the original query parameters unchanged.

Affected products

• Go: before 1.18.7; from 1.19.0 before 1.19.2 — fixed in 1.18.7, 1.19.2

How to fix

Upgrade to a fixed version: Go 1.18.7, 1.19.2. Check the vendor advisory for mitigations.

References

• https://go.dev/cl/432976
• https://go.dev/issue/54663
• https://groups.google.com/g/golang-announce/c/xtuG5faxtaU
• https://pkg.go.dev/vuln/GO-2022-1038
• https://security.gentoo.org/glsa/202311-09
• https://go.dev/cl/432976
• https://go.dev/issue/54663
• https://groups.google.com/g/golang-announce/c/xtuG5faxtaU
• https://pkg.go.dev/vuln/GO-2022-1038
• https://security.gentoo.org/glsa/202311-09

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