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CVE-2026-47070

6.1 · MEDIUM

Sensitive Data Exposure vulnerability in benoitc hackney allows Retrieve Embedded Sensitive Data.

Published May 25, 2026CWE-601EPSS 0.35%

Overview

CVE-2026-47070 is a medium-severity vulnerability. It was published on May 25, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcna.erlef.org/cves/CVE-2026-47070.htmlGitHubgithub.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246GitHubgithub.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4Refosv.dev/vulnerability/EEF-CVE-2026-47070GitHubgithub.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-47070?

CVE-2026-47070 is a medium-severity vulnerability. It was published on May 25, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-47070?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-47070?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-47070?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-47070 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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