Is CVE-2026-47070 actively exploited?

No active exploitation of CVE-2026-47070 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-47070 be exploited remotely?

Yes. CVE-2026-47070 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-47070?

CVE-2026-47070 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2026-47070

CWE-601Published: May 25, 2026· Updated: May 27, 2026

6.1

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.6th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-47070 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.