CVE-2026-47070HTTP/3 redirect handler leaks Authorization and Cookie headers to cross-origin redirect target in hackney

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4 vendor-advisoryrelatedExploitPatch
• https://cna.erlef.org/cves/CVE-2026-47070.html relatedPatchThird Party Advisory
• https://osv.dev/vulnerability/EEF-CVE-2026-47070 relatedPatchThird Party Advisory
• https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246 patchPatch