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CVE-2026-47075

7.5 · HIGH

Improper Neutralization of CRLF Sequences vulnerability in benoitc hackney allows HTTP Request Splitting.

Published May 25, 2026CWE-93EPSS 0.42%

Overview

CVE-2026-47075 is a high-severity vulnerability. It was published on May 25, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

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-2026-47075.htmlGitHubgithub.com/benoitc/hackney/commit/ca73dd0aba0ed557449c18288bf07241671a43c9GitHubgithub.com/benoitc/hackney/security/advisories/GHSA-j9wq-vxxc-94wfRefosv.dev/vulnerability/EEF-CVE-2026-47075GitHubgithub.com/benoitc/hackney/security/advisories/GHSA-j9wq-vxxc-94wf

How CyberStrike helps

Frequently asked questions

What is CVE-2026-47075?

CVE-2026-47075 is a high-severity vulnerability. It was published on May 25, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-47075?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-47075?

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-2026-47075?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-47075 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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