Vulnerability-Lookup

CVE-2026-47070 (GCVE-0-2026-47070)

Vulnerability from cvelistv5 – Published: 2026-05-25 14:00 – Updated: 2026-05-27 15:41

Title

HTTP/3 redirect handler leaks Authorization and Cookie headers to cross-origin redirect target in hackney

Summary

Sensitive Data Exposure vulnerability in benoitc hackney allows Retrieve Embedded Sensitive Data. The HTTP/3 redirect handler in src/hackney_h3.erl passes the original request headers unchanged to the redirect target without performing any cross-origin check. When a client issues an HTTP/3 request with follow_redirect enabled and includes Authorization or Cookie headers, a server responding with a 3xx redirect to a different host will cause the client to forward those credentials verbatim to the new origin. The main hackney.erl module has maybe_strip_auth_on_redirect/2 (guarded by the location_trusted option) to address CVE-2018-1000007, but hackney_h3.erl is missing this protection entirely. This issue affects hackney: from 3.1.1 before 4.0.1.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-26 15:47 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

EEF CNA under the mitre root

CNA scorecard A 96/100 over 309 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/benoitc/hackney/security/advis…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-47070.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-47070	related
https://github.com/benoitc/hackney/commit/c58d5b5…	patch

Impacted products

2 products

Vendor	Product	Version	CPE status
benoitc	hackney	Affected: 3.1.1 , < 4.0.1 (semver) cpe:2.3:a:benoitc:hackney::::::::
benoitc	hackney	Affected: e61b7d04b7826847e1efe614106ef4d580c78eab , < c58d5b50bade146360b85caf3dc8065807b08246 (git) cpe:2.3:a:benoitc:hackney::::::::

Credits

Peter Ullrich Benoit Chesneau Jonatan Männchen / EEF

Show details on NVD website

JSON

To clipboard

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                ],
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              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
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            {
              "collectionURL": "https://repo.hex.pm",
              "cpes": [
                "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"
              ],
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                {
                  "name": "hackney_h3:do_request_with_redirect/8"
                }
              ],
              "repo": "https://github.com/benoitc/hackney",
              "vendor": "benoitc",
              "versions": [
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                  "status": "affected",
                  "version": "3.1.1",
                  "versionType": "semver"
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            },
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              "modules": [
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              "packageName": "benoitc/hackney",
              "packageURL": "pkg:github/benoitc/hackney",
              "product": "hackney",
              "programFiles": [
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              ],
              "repo": "https://github.com/benoitc/hackney",
              "vendor": "benoitc",
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                  "negate": false,
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          "credits": [
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            },
            {
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              "value": "Benoit Chesneau"
            },
            {
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              "type": "analyst",
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            }
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          "descriptions": [
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              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Sensitive Data Exposure vulnerability in benoitc hackney allows Retrieve Embedded Sensitive Data.\u003cp\u003eThe HTTP/3 redirect handler in \u003ctt\u003esrc/hackney_h3.erl\u003c/tt\u003e passes the original request headers unchanged to the redirect target without performing any cross-origin check. When a client issues an HTTP/3 request with \u003ctt\u003efollow_redirect\u003c/tt\u003e enabled and includes \u003ctt\u003eAuthorization\u003c/tt\u003e or \u003ctt\u003eCookie\u003c/tt\u003e headers, a server responding with a \u003ctt\u003e3xx\u003c/tt\u003e redirect to a different host will cause the client to forward those credentials verbatim to the new origin.\u003c/p\u003e\u003cp\u003eThe main \u003ctt\u003ehackney.erl\u003c/tt\u003e module has \u003ctt\u003emaybe_strip_auth_on_redirect/2\u003c/tt\u003e (guarded by the \u003ctt\u003elocation_trusted\u003c/tt\u003e option) to address CVE-2018-1000007, but \u003ctt\u003ehackney_h3.erl\u003c/tt\u003e is missing this protection entirely.\u003c/p\u003e\u003cp\u003eThis issue affects hackney: from 3.1.1 before 4.0.1.\u003c/p\u003e"
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          "references": [
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            },
            {
              "tags": [
                "related"
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              "url": "https://cna.erlef.org/cves/CVE-2026-47070.html"
            },
            {
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                "related"
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              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-47070"
            },
            {
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            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "HTTP/3 redirect handler leaks Authorization and Cookie headers to cross-origin redirect target in hackney",
          "x_generator": {
            "engine": "cvelib 1.8.0"
          }
        }
      },
      "cveMetadata": {
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        "assignerShortName": "EEF",
        "cveId": "CVE-2026-47070",
        "datePublished": "2026-05-25T14:00:46.420Z",
        "dateReserved": "2026-05-18T17:28:08.322Z",
        "dateUpdated": "2026-05-27T15:41:16.046Z",
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      "dataType": "CVE_RECORD",
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  }
}

FKIE_CVE-2026-47070

Vulnerability from fkie_nvd - Published: 2026-05-25 15:16 - Updated: 2026-07-24 10:10

Severity

6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Summary

References

URL	Tags
6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-47070.html	Patch, Third Party Advisory
6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246	Patch
6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4	Exploit, Patch, Vendor Advisory
6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-47070	Patch, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4	Exploit, Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	benoitc	hackney	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "hackney_h3"
          ],
          "packageName": "hackney",
          "packageURL": "pkg:hex/hackney",
          "product": "hackney",
          "programFiles": [
            "src/hackney_h3.erl"
          ],
          "programRoutines": [
            {
              "name": "hackney_h3:handle_redirect/11"
            },
            {
              "name": "hackney_h3:do_request_with_redirect/8"
            }
          ],
          "repo": "https://github.com/benoitc/hackney",
          "vendor": "benoitc",
          "versions": [
            {
              "lessThan": "4.0.1",
              "status": "affected",
              "version": "3.1.1",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "hackney_h3"
          ],
          "packageName": "benoitc/hackney",
          "packageURL": "pkg:github/benoitc/hackney",
          "product": "hackney",
          "programFiles": [
            "src/hackney_h3.erl"
          ],
          "programRoutines": [
            {
              "name": "hackney_h3:handle_redirect/11"
            },
            {
              "name": "hackney_h3:do_request_with_redirect/8"
            }
          ],
          "repo": "https://github.com/benoitc/hackney",
          "vendor": "benoitc",
          "versions": [
            {
              "lessThan": "c58d5b50bade146360b85caf3dc8065807b08246",
              "status": "affected",
              "version": "e61b7d04b7826847e1efe614106ef4d580c78eab",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8C414FFB-6D14-4614-BD00-0AB5C3ECE4F9",
              "versionEndExcluding": "4.0.1",
              "versionStartIncluding": "3.1.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Sensitive Data Exposure vulnerability in benoitc hackney allows Retrieve Embedded Sensitive Data. The HTTP/3 redirect handler in src/hackney_h3.erl passes the original request headers unchanged to the redirect target without performing any cross-origin check. When a client issues an HTTP/3 request with follow_redirect enabled and includes Authorization or Cookie headers, a server responding with a 3xx redirect to a different host will cause the client to forward those credentials verbatim to the new origin.\n\nThe main hackney.erl module has maybe_strip_auth_on_redirect/2 (guarded by the location_trusted option) to address CVE-2018-1000007, but hackney_h3.erl is missing this protection entirely.\n\nThis issue affects hackney: from 3.1.1 before 4.0.1."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de Exposici\u00f3n de Datos Sensibles en benoitc hackney permite Recuperar Datos Sensibles Incrustados. El gestor de redirecci\u00f3n HTTP/3 en src/hackney_h3.erl pasa las cabeceras de la solicitud original sin cambios al objetivo de redirecci\u00f3n sin realizar ninguna comprobaci\u00f3n de origen cruzado. Cuando un cliente emite una solicitud HTTP/3 con follow_redirect habilitado e incluye cabeceras de Autorizaci\u00f3n o Cookie, un servidor que responde con una redirecci\u00f3n 3xx a un host diferente har\u00e1 que el cliente reenv\u00ede esas credenciales textualmente al nuevo origen.\n\nEl m\u00f3dulo principal hackney.erl tiene maybe_strip_auth_on_redirect/2 (protegido por la opci\u00f3n location_trusted) para abordar CVE-2018-1000007, pero hackney_h3.erl carece completamente de esta protecci\u00f3n.\n\nEste problema afecta a hackney: desde 3.1.1 antes de 4.0.1."
    }
  ],
  "id": "CVE-2026-47070",
  "lastModified": "2026-07-24T10:10:00.197",
  "metrics": {
    "cvssMetricV31": [
      {
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "confidentialityImpact": "LOW",
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          "privilegesRequired": "NONE",
          "scope": "CHANGED",
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    "cvssMetricV40": [
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        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
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          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.0,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
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          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
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          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "options": [
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            },
            {
              "automatable": "no"
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              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-26T15:47:18.083809Z",
          "version": "2.0.3"
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  "published": "2026-05-25T15:16:22.010",
  "references": [
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      "url": "https://cna.erlef.org/cves/CVE-2026-47070.html"
    },
    {
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      "tags": [
        "Patch"
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      "url": "https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246"
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    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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        "Vendor Advisory"
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      "url": "https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4"
    },
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      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary"
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}

GHSA-H73Q-4W9Q-82H4

Vulnerability from github – Published: 2026-06-26 21:56 – Updated: 2026-06-26 21:56

Summary

Hackney: Cross-origin Redirect Leaks Authorization, Cookie, and Request Body

Details

Summary

The HTTP/3 redirect handler in src/hackney_h3.erl forwards the original request headers (Authorization, Cookie, Proxy-Authorization) and, for 307/308 responses, the original request body to the redirect target without checking whether the target host matches the origin. When follow_redirect is enabled and a server responds with a cross-origin Location, hackney delivers the caller's credentials verbatim to the attacker-controlled host. The main hackney HTTP/1 client has maybe_strip_auth_on_redirect/2 (the fix for CVE-2018-1000007); the H3 client was added later without it.

Details

In src/hackney_h3.erl, handle_redirect/11 (line 165) extracts the redirect target from the server-controlled Location header via get_redirect_location/1 and resolves it with resolve_redirect_url/2, which accepts any absolute http:// or https:// URL. It then calls do_request_with_redirect/8 passing the original Headers list unchanged. For 307/308 responses, redirect_method/2 preserves the original method and body, so the POST body is also forwarded.

No comparison is made between the original URL's scheme, host, or port and the redirect target. The downstream connect/3 opens a new QUIC connection to whatever the Location header named, and build_request_headers/4 serializes the unmodified headers into the QPACK-encoded request.

PoC

Issue an HTTP/3 POST to an attacker-controlled origin with follow_redirect => true and an Authorization: Bearer ... header.
The attacker's server responds 307 Location: https://other.host/collect.
hackney opens a new connection to other.host and re-sends the original headers and body, including the bearer token and any Cookie headers.

Impact

Credential and request-body disclosure to attacker-controlled origins. Affects hackney 3.1.1 through 4.0.0 when using the HTTP/3 client with follow_redirect enabled. Any upstream that is malicious, compromised, or reachable via DNS/MITM can steal session tokens, bearer credentials, and POST bodies. CVSS v4.0: 6.0 (MEDIUM).

Resources

Introduction commit: https://github.com/benoitc/hackney/commit/e61b7d04b7826847e1efe614106ef4d580c78eab
Patch commit: https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246

Severity

6.0 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Hex",
        "name": "hackney"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.1.1"
            },
            {
              "fixed": "4.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47070"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-26T21:56:29Z",
    "nvd_published_at": "2026-05-25T15:16:22Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nThe HTTP/3 redirect handler in `src/hackney_h3.erl` forwards the original request headers (`Authorization`, `Cookie`, `Proxy-Authorization`) and, for 307/308 responses, the original request body to the redirect target without checking whether the target host matches the origin. When `follow_redirect` is enabled and a server responds with a cross-origin `Location`, hackney delivers the caller\u0027s credentials verbatim to the attacker-controlled host. The main hackney HTTP/1 client has `maybe_strip_auth_on_redirect/2` (the fix for CVE-2018-1000007); the H3 client was added later without it.\n\n### Details\n\nIn `src/hackney_h3.erl`, `handle_redirect/11` (line 165) extracts the redirect target from the server-controlled `Location` header via `get_redirect_location/1` and resolves it with `resolve_redirect_url/2`, which accepts any absolute `http://` or `https://` URL. It then calls `do_request_with_redirect/8` passing the original `Headers` list unchanged. For 307/308 responses, `redirect_method/2` preserves the original method and body, so the POST body is also forwarded.\n\nNo comparison is made between the original URL\u0027s scheme, host, or port and the redirect target. The downstream `connect/3` opens a new QUIC connection to whatever the `Location` header named, and `build_request_headers/4` serializes the unmodified headers into the QPACK-encoded request.\n\n### PoC\n\n1. Issue an HTTP/3 POST to an attacker-controlled origin with `follow_redirect =\u003e true` and an `Authorization: Bearer ...` header.\n2. The attacker\u0027s server responds `307 Location: https://other.host/collect`.\n3. hackney opens a new connection to `other.host` and re-sends the original headers and body, including the bearer token and any `Cookie` headers.\n\n### Impact\n\nCredential and request-body disclosure to attacker-controlled origins. Affects hackney 3.1.1 through 4.0.0 when using the HTTP/3 client with `follow_redirect` enabled. Any upstream that is malicious, compromised, or reachable via DNS/MITM can steal session tokens, bearer credentials, and POST bodies. CVSS v4.0: **6.0 (MEDIUM)**.\n\n## Resources\n\n* Introduction commit: https://github.com/benoitc/hackney/commit/e61b7d04b7826847e1efe614106ef4d580c78eab\n* Patch commit: https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246",
  "id": "GHSA-h73q-4w9q-82h4",
  "modified": "2026-06-26T21:56:29Z",
  "published": "2026-06-26T21:56:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47070"
    },
    {
      "type": "WEB",
      "url": "https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246"
    },
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-47070.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/benoitc/hackney"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-47070"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Hackney: Cross-origin Redirect Leaks Authorization, Cookie, and Request Body"
}

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CVE-2026-47070 (GCVE-0-2026-47070)

FKIE_CVE-2026-47070

GHSA-H73Q-4W9Q-82H4

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