Is CVE-2026-47072 actively exploited?

No active exploitation of CVE-2026-47072 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-47072 be exploited remotely?

Yes. CVE-2026-47072 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-47072?

CVE-2026-47072 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-47072

CWE-93Published: May 25, 2026· Updated: May 28, 2026

7.5

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.8th

Official Description

Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in benoitc hackney allows HTTP Request/Response Splitting. The WebSocket upgrade code in src/hackney_ws.erl copies the host, path, headers (ExtraHeaders), and protocols options from the caller-supplied opts map into the internal #ws_data{} record in init/1 and then splices them verbatim into the raw HTTP/1.1 upgrade request by binary concatenation in do_handshake/1. No CRLF or NUL stripping is performed at any of these four injection sites. An attacker who controls any of these options — for example by forwarding URL components or header values from untrusted input into hackney_ws:start_link/1 — can inject arbitrary HTTP headers into the outbound WebSocket upgrade request, leading to header injection, credential spoofing toward the upstream server, log and cache poisoning, or request smuggling via intermediary proxies.

This issue affects hackney: from 2.0.0 before 4.0.1.

NVD Source

Technical Analysis

CVE-2026-47072 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.