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2 vulnerabilities found for net/http/httputil by Go standard library

CVE-2026-39825 (GCVE-0-2026-39825)
Vulnerability from cvelistv5
Published
2026-05-07 19:41
Modified
2026-05-08 21:30
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
Summary
ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function.
References
Impacted products
Vendor Product Version
Go standard library net/http/httputil Version: 0   ≤
Version: 1.26.0-0   ≤
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{
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      {
        "metrics": [
          {
            "cvssV3_1": {
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              "baseSeverity": "MEDIUM",
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                "timestamp": "2026-05-08T16:46:43.329507Z",
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
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        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4976"
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      "title": "ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil"
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}

CVE-2022-2880 (GCVE-0-2022-2880)
Vulnerability from cvelistv5
Published
2022-10-14 00:00
Modified
2025-02-13 16:32
Severity ?
CWE
Summary
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.
References
Impacted products
Vendor Product Version
Go standard library net/http/httputil Version: 0   ≤
Version: 1.19.0-0   ≤
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Show details on NVD website

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