CVE-2026-47070

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.

Affected Software

VendorProductVersion RangeStatus
benoitchackney3.1.1 < 4.0.1affected
benoitchackneye61b7d04b7826847e1efe614106ef4d580c78eab < c58d5b50bade146360b85caf3dc8065807b08246affected

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: partial

Additional References

References