CVE-2026-48856 (GCVE-0-2026-48856)

Vulnerability from cvelistv5 – Published: 2026-06-10 14:41 – Updated: 2026-10-15 10:50
VLAI
Title
httpc leaks Authorization header to cross-origin redirect targets
Summary
Sensitive Data Exposure vulnerability in Erlang OTP inets (httpc_response module) allows Retrieve Embedded Sensitive Data. The httpc client forwards the Authorization and Proxy-Authorization request headers to redirect targets without checking whether the redirect crosses an origin boundary. httpc_response:redirect/2 constructs the redirected request by updating only the host field of the header record; all other fields (including authorization and proxy_authorization) are copied verbatim. The redirect target host is never compared against the original host. autoredirect defaults to true, so this affects all httpc callers that do not explicitly disable automatic redirects. An attacker who controls a server that the victim contacts via httpc can issue a cross-origin 3xx redirect to a server they also control. The Authorization header (including Basic credentials derived from URL userinfo via httpc_request:handle_user_info/2) is forwarded to the redirect target, allowing credential theft. The same applies to the Proxy-Authorization header. This vulnerability is associated with program files lib/inets/src/http_client/httpc_response.erl. This issue affects OTP from OTP 17.0 before OTP 27.3.4.19, OTP 28.5.0.8, and OTP 29.1.2, corresponding to inets from 5.10 before 9.3.2.8, 9.6.2.4, and 9.8.1. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 16:23 UTC
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
EEF CNA under the mitre root
CNA scorecard A 97/100 over 345 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Erlang OTP Affected: 17.0 , < * (otp)
    cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Create a notification for this product.
Erlang OTP Affected: 5.10 , < * (otp)
    cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Create a notification for this product.
Erlang OTP Affected: 84adefa331c4159d432d22840663c38f155cd4c1 , < f78fae9294886f95545a2212671282eda230def1 (git)
Unaffected: f78fae9294886f95545a2212671282eda230def1 , < * (git)
    cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-06-10 14:41
Credits
Jonatan Männchen / EEF Jonatan Männchen / EEF Konrad Pietrzak Ingela Andin Konrad Pietrzak
Show details on NVD website
To clipboard 

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            "value": "Sensitive Data Exposure vulnerability in Erlang OTP inets (httpc_response module) allows Retrieve Embedded Sensitive Data.\n\nThe httpc client forwards the Authorization and Proxy-Authorization request headers to redirect targets without checking whether the redirect crosses an origin boundary. httpc_response:redirect/2 constructs the redirected request by updating only the host field of the header record; all other fields (including authorization and proxy_authorization) are copied verbatim. The redirect target host is never compared against the original host.\n\nautoredirect defaults to true, so this affects all httpc callers that do not explicitly disable automatic redirects.\n\nAn attacker who controls a server that the victim contacts via httpc can issue a cross-origin 3xx redirect to a server they also control. The Authorization header (including Basic credentials derived from URL userinfo via httpc_request:handle_user_info/2) is forwarded to the redirect target, allowing credential theft. The same applies to the Proxy-Authorization header.\n\nThis vulnerability is associated with program files lib/inets/src/http_client/httpc_response.erl.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.19, OTP\u00a028.5.0.8, and OTP\u00a029.1.2, corresponding to inets from 5.10 before 9.3.2.8, 9.6.2.4, and 9.8.1. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."
          },
          {
            "lang": "es",
            "value": "Vulnerabilidad de exposici\u00f3n de datos sensibles en Erlang OTP inets (m\u00f3dulo httpc_response) permite la recuperaci\u00f3n de datos sensibles incrustados.\n\nEl cliente httpc reenv\u00eda los encabezados de solicitud \u2019Authorization\u2019 y \u2019Proxy-Authorization\u2019 a destinos de redirecci\u00f3n sin verificar si la redirecci\u00f3n cruza un l\u00edmite de origen. httpc_response:redirect/2 construye la solicitud redirigida actualizando solo el campo \u2019host\u2019 del registro del encabezado; todos los dem\u00e1s campos (incluidos \u2019authorization\u2019 y \u2019proxy_authorization\u2019) se copian textualmente. El host de destino de la redirecci\u00f3n nunca se compara con el host original.\n\n\u2019autoredirect\u2019 tiene un valor predeterminado de \u2019true\u2019, por lo que esto afecta a todos los llamadores de httpc que no deshabilitan expl\u00edcitamente las redirecciones autom\u00e1ticas.\n\nUn atacante que controla un servidor al que la v\u00edctima contacta a trav\u00e9s de httpc puede emitir una redirecci\u00f3n 3xx de origen cruzado a un servidor que tambi\u00e9n controlan. El encabezado \u2019Authorization\u2019 (incluidas las credenciales b\u00e1sicas derivadas de la informaci\u00f3n de usuario de la URL a trav\u00e9s de httpc_request:handle_user_info/2) se reenv\u00eda al destino de la redirecci\u00f3n, permitiendo el robo de credenciales. Lo mismo se aplica al encabezado \u2019Proxy-Authorization\u2019.\n\nEsta vulnerabilidad est\u00e1 asociada con los archivos de programa lib/inets/src/http_client/httpc_response.erl.\n\nEste problema afecta a OTP desde la versi\u00f3n 17.0 de OTP hasta versiones anteriores a la 27.3.4.19 de OTP, y a las versiones 28.5.0.8 de OTP y 29.1.2 de OTP, lo que corresponde a inets desde la versi\u00f3n 5.10 hasta versiones anteriores a la 9.3.2.8, y a las versiones 9.6.2.4 y 9.8.1. Se desconoce si OTP en versiones anteriores a la 17.0 de OTP, lo que corresponde a inets en versiones anteriores a la 5.10, est\u00e1 afectado."
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                  "value": "\u003cp\u003eSensitive Data Exposure vulnerability in Erlang OTP inets (\u003ccode\u003ehttpc_response\u003c/code\u003e module) allows Retrieve Embedded Sensitive Data.\u003c/p\u003e\n\u003cp\u003eThe \u003ccode\u003ehttpc\u003c/code\u003e client forwards the \u003ccode\u003eAuthorization\u003c/code\u003e and \u003ccode\u003eProxy-Authorization\u003c/code\u003e request headers to redirect targets without checking whether the redirect crosses an origin boundary. \u003ccode\u003ehttpc_response:redirect/2\u003c/code\u003e constructs the redirected request by updating only the \u003ccode\u003ehost\u003c/code\u003e field of the header record; all other fields (including \u003ccode\u003eauthorization\u003c/code\u003e and \u003ccode\u003eproxy_authorization\u003c/code\u003e) are copied verbatim. The redirect target host is never compared against the original host.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eautoredirect\u003c/code\u003e defaults to \u003ccode\u003etrue\u003c/code\u003e, so this affects all \u003ccode\u003ehttpc\u003c/code\u003e callers that do not explicitly disable automatic redirects.\u003c/p\u003e\n\u003cp\u003eAn attacker who controls a server that the victim contacts via \u003ccode\u003ehttpc\u003c/code\u003e can issue a cross-origin 3xx redirect to a server they also control. The \u003ccode\u003eAuthorization\u003c/code\u003e header (including Basic credentials derived from URL userinfo via \u003ccode\u003ehttpc_request:handle_user_info/2\u003c/code\u003e) is forwarded to the redirect target, allowing credential theft. The same applies to the \u003ccode\u003eProxy-Authorization\u003c/code\u003e header.\u003c/p\u003e\n\u003cp\u003eThis vulnerability is associated with program files \u003ccode\u003elib/inets/src/http_client/httpc_response.erl\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eThis issue affects OTP from OTP\u0026nbsp;17.0 before OTP\u0026nbsp;27.3.4.19, OTP\u0026nbsp;28.5.0.8, and OTP\u0026nbsp;29.1.2, corresponding to inets from 5.10 before 9.3.2.8, 9.6.2.4, and 9.8.1. Whether OTP before OTP\u0026nbsp;17.0, corresponding to inets before 5.10, is affected is unknown.\u003c/p\u003e"
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                  "value": "Sensitive Data Exposure vulnerability in Erlang OTP inets (`httpc_response` module) allows Retrieve Embedded Sensitive Data.\n\nThe `httpc` client forwards the `Authorization` and `Proxy-Authorization` request headers to redirect targets without checking whether the redirect crosses an origin boundary. `httpc_response:redirect/2` constructs the redirected request by updating only the `host` field of the header record; all other fields (including `authorization` and `proxy_authorization`) are copied verbatim. The redirect target host is never compared against the original host.\n\n`autoredirect` defaults to `true`, so this affects all `httpc` callers that do not explicitly disable automatic redirects.\n\nAn attacker who controls a server that the victim contacts via `httpc` can issue a cross-origin 3xx redirect to a server they also control. The `Authorization` header (including Basic credentials derived from URL userinfo via `httpc_request:handle_user_info/2`) is forwarded to the redirect target, allowing credential theft. The same applies to the `Proxy-Authorization` header.\n\nThis vulnerability is associated with program files `lib/inets/src/http_client/httpc_response.erl`.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.19, OTP\u00a028.5.0.8, and OTP\u00a029.1.2, corresponding to inets from 5.10 before 9.3.2.8, 9.6.2.4, and 9.8.1. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."
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              "value": "Sensitive Data Exposure vulnerability in Erlang OTP inets (httpc_response module) allows Retrieve Embedded Sensitive Data.\n\nThe httpc client forwards the Authorization and Proxy-Authorization request headers to redirect targets without checking whether the redirect crosses an origin boundary. httpc_response:redirect/2 constructs the redirected request by updating only the host field of the header record; all other fields (including authorization and proxy_authorization) are copied verbatim. The redirect target host is never compared against the original host.\n\nautoredirect defaults to true, so this affects all httpc callers that do not explicitly disable automatic redirects.\n\nAn attacker who controls a server that the victim contacts via httpc can issue a cross-origin 3xx redirect to a server they also control. The Authorization header (including Basic credentials derived from URL userinfo via httpc_request:handle_user_info/2) is forwarded to the redirect target, allowing credential theft. The same applies to the Proxy-Authorization header.\n\nThis vulnerability is associated with program files lib/inets/src/http_client/httpc_response.erl.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.19, OTP\u00a028.5.0.8, and OTP\u00a029.1.2, corresponding to inets from 5.10 before 9.3.2.8, 9.6.2.4, and 9.8.1. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."
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                "subIntegrityImpact": "NONE",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-601",
                  "description": "CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-15T10:50:06.903Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "name": "GitHub Advisory",
              "tags": [
                "related",
                "vendor-advisory"
              ],
              "url": "https://github.com/erlang/otp/security/advisories/GHSA-m75x-4vwg-ggjh"
            },
            {
              "name": "EEF CNA record for CVE-2026-48856",
              "tags": [
                "related"
              ],
              "url": "https://cna.erlef.org/cves/CVE-2026-48856.html"
            },
            {
              "name": "OSV record EEF-CVE-2026-48856",
              "tags": [
                "related"
              ],
              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48856"
            },
            {
              "name": "Erlang/OTP version ordering",
              "tags": [
                "x_version-scheme"
              ],
              "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
            },
            {
              "name": "Fix commit f78fae9 in erlang/otp",
              "tags": [
                "patch"
              ],
              "url": "https://github.com/erlang/otp/commit/f78fae9294886f95545a2212671282eda230def1"
            }
          ],
          "source": {
            "discovery": "INTERNAL"
          },
          "title": "httpc leaks Authorization header to cross-origin redirect targets",
          "workarounds": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cul\u003e\n\u003cli\u003eSet \u003ccode\u003e{autoredirect, false}\u003c/code\u003e in the \u003ccode\u003ehttpc:request/4\u003c/code\u003e options and handle redirects manually, stripping the \u003ccode\u003eAuthorization\u003c/code\u003e header when the redirect crosses an origin boundary.\u003c/li\u003e\n\u003cli\u003eEnsure that \u003ccode\u003ehttpc\u003c/code\u003e is only used to contact trusted servers that will not issue cross-origin redirects.\u003c/li\u003e\n\u003c/ul\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "* Set `{autoredirect, false}` in the `httpc:request/4` options and handle redirects manually, stripping the `Authorization` header when the redirect crosses an origin boundary.\n* Ensure that `httpc` is only used to contact trusted servers that will not issue cross-origin redirects."
                }
              ],
              "value": "* Set {autoredirect, false} in the httpc:request/4 options and handle redirects manually, stripping the Authorization header when the redirect crosses an origin boundary.\n* Ensure that httpc is only used to contact trusted servers that will not issue cross-origin redirects."
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-48856",
        "datePublished": "2026-06-10T14:41:51.616Z",
        "dateReserved": "2026-05-25T20:44:10.697Z",
        "dateUpdated": "2026-10-15T10:50:06.903Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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