{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*","versionEndExcluding":"4.0.1","versionStartIncluding":"3.1.1","vulnerable":true}],"negate":false,"operator":"AND"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"Peter Ullrich"},{"lang":"en","type":"remediation developer","value":"Benoit Chesneau"},{"lang":"en","type":"analyst","value":"Jonatan Männchen"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Sensitive Data Exposure vulnerability in benoitc hackney allows Retrieve Embedded Sensitive Data.<p>The HTTP/3 redirect handler in <tt>src/hackney_h3.erl</tt> 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 <tt>follow_redirect</tt> enabled and includes <tt>Authorization</tt> or <tt>Cookie</tt> headers, a server responding with a <tt>3xx</tt> redirect to a different host will cause the client to forward those credentials verbatim to the new origin.</p><p>The main <tt>hackney.erl</tt> module has <tt>maybe_strip_auth_on_redirect/2</tt> (guarded by the <tt>location_trusted</tt> option) to address CVE-2018-1000007, but <tt>hackney_h3.erl</tt> is missing this protection entirely.</p><p>This issue affects hackney: from 3.1.1 before 4.0.1.</p>"}],"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."}],"impacts":[{"capecId":"CAPEC-37","descriptions":[{"lang":"en","value":"CAPEC-37 Retrieve Embedded Sensitive Data"}]}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","description":"CWE-601 URL Redirection to Untrusted Site ('Open Redirect')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-05-25T14:00:46.420Z","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-47070.html"},{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-47070"},{"tags":["patch"],"url":"https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246"}],"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":{"assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","assignerShortName":"EEF","cveId":"CVE-2026-47070","datePublished":"2026-05-25T14:00:46.420Z","dateReserved":"2026-05-18T17:28:08.322Z","dateUpdated":"2026-05-25T14:00:46.420Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}