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NVD description
Improper Neutralization of CRLF Sequences vulnerability in benoitc hackney allows HTTP Request Splitting. hackney does not percent-encode carriage return (\r) or line feed (\n) characters in the URL query component before constructing the HTTP/1.1 request target. Characters outside the grammar defined in RFC 3986 Section 3.4 must be percent-encoded, but hackney_url:make_url/3 passes the query binary directly without validation or escaping. An attacker who can control all or part of a URL passed to hackney can inject raw CRLF sequences into the query string, which are then sent as HTTP line breaks in the request target. This enables injection of arbitrary HTTP headers or splitting of the HTTP request. This issue affects hackney: from 0.13.1 before 4.0.1.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
🔴 #CVE-2026-47075: Hackney (Erlang) CRLF Injection / HTTP Request Splitting (High) -DC-May2026-30 https://dailycve.com/cve-2026-47075-hackney-erlang-crlf-injection-http-request-splitting-high-dc-may2026-30/
Post summary
A brief disclosure of CVE-2026-47075, a high‑severity CRLF injection/HTTP request splitting flaw in Hackney (Erlang), with a link to a DailyCVE article.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | benoitc | hackney | - | - | - |