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

    CVE-2026-39825 (GCVE-0-2026-39825)

    Vulnerability from nvd – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:30
    VLAI
    Title
    ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil
    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.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
    Assigner
    Go
    References
    Impacted products
    Vendor Product Version
    Go standard library net/http/httputil Affected: 0 , < 1.25.10 (semver)
    Affected: 1.26.0-0 , < 1.26.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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          {
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
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              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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                "timestamp": "2026-05-08T16:46:43.329507Z",
                "version": "2.0.3"
              },
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            }
          }
        ],
        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "title": "CISA ADP Vulnrichment"
      }
    ],
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        {
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          "defaultStatus": "unaffected",
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            {
              "name": "cleanQueryParams"
            },
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              "name": "ReverseProxy.ServeHTTP"
            }
          ],
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        }
      ],
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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 nvd – Published: 2022-10-14 00:00 – Updated: 2025-02-13 16:32
    VLAI
    Title
    Incorrect sanitization of forwarded query parameters in net/http/httputil
    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.
    Severity
    No CVSS data available.
    CWE
    • CWE-444 - Inconsistent Interpretation of HTTP Requests
    Assigner
    Go
    References
    Impacted products
    Vendor Product Version
    Go standard library net/http/httputil Affected: 0 , < 1.18.7 (semver)
    Affected: 1.19.0-0 , < 1.19.2 (semver)
    		Create a notification for this product.
    Credits
    Gal Goldstein (Security Researcher, Oxeye) Daniel Abeles (Head of Research, Oxeye)
    Show details on NVD website
    To clipboard 

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    CVE-2026-39825 (GCVE-0-2026-39825)

    Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:30
    VLAI
    Title
    ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil
    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.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
    Assigner
    Go
    References
    Impacted products
    Vendor Product Version
    Go standard library net/http/httputil Affected: 0 , < 1.25.10 (semver)
    Affected: 1.26.0-0 , < 1.26.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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    CVE-2022-2880 (GCVE-0-2022-2880)

    Vulnerability from cvelistv5 – Published: 2022-10-14 00:00 – Updated: 2025-02-13 16:32
    VLAI
    Title
    Incorrect sanitization of forwarded query parameters in net/http/httputil
    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.
    Severity
    No CVSS data available.
    CWE
    • CWE-444 - Inconsistent Interpretation of HTTP Requests
    Assigner
    Go
    References
    Impacted products
    Vendor Product Version
    Go standard library net/http/httputil Affected: 0 , < 1.18.7 (semver)
    Affected: 1.19.0-0 , < 1.19.2 (semver)
    		Create a notification for this product.
    Credits
    Gal Goldstein (Security Researcher, Oxeye) Daniel Abeles (Head of Research, Oxeye)
    Show details on NVD website
    To clipboard 

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