CVE-2026-48856

Full vulnerability record from the local CVENow database.

Description

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

HIGH

CVSS score

7.1 (v4.0)

Vulnerability status

Modified

Source identifier

6b3ad84c-e1a6-4bf7-a703-f496b71e49db

Published

2026-06-10 16:17:10.053000

Last modified

2026-10-26 11:10:00.157000

View original CVE JSON

{
  "id": "CVE-2026-48856",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "published": "2026-06-10T16:17:10.053",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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 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."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de exposición de datos sensibles en Erlang OTP inets (módulo httpc_response) permite la recuperación de datos sensibles incrustados.\n\nEl cliente httpc reenvía los encabezados de solicitud ’Authorization’ y ’Proxy-Authorization’ a destinos de redirección sin verificar si la redirección cruza un límite de origen. httpc_response:redirect/2 construye la solicitud redirigida actualizando solo el campo ’host’ del registro del encabezado; todos los demás campos (incluidos ’authorization’ y ’proxy_authorization’) se copian textualmente. El host de destino de la redirección nunca se compara con el host original.\n\n’autoredirect’ tiene un valor predeterminado de ’true’, por lo que esto afecta a todos los llamadores de httpc que no deshabilitan explícitamente las redirecciones automáticas.\n\nUn atacante que controla un servidor al que la víctima contacta a través de httpc puede emitir una redirección 3xx de origen cruzado a un servidor que también controlan. El encabezado ’Authorization’ (incluidas las credenciales básicas derivadas de la información de usuario de la URL a través de httpc_request:handle_user_info/2) se reenvía al destino de la redirección, permitiendo el robo de credenciales. Lo mismo se aplica al encabezado ’Proxy-Authorization’.\n\nEsta vulnerabilidad está asociada con los archivos de programa lib/inets/src/http_client/httpc_response.erl.\n\nEste problema afecta a OTP desde la versión 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 versión 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, está afectado."
    }
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          "Safety": "NOT_DEFINED",
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          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
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    "cvssMetricV31": [
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