EEF-CVE-2026-47075

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Source

https://cna.erlef.org/osv/EEF-CVE-2026-47075.html

Import Source

https://cna.erlef.org/osv/EEF-CVE-2026-47075.json

JSON Data

https://api.osv.dev/v1/vulns/EEF-CVE-2026-47075

Aliases

CVE-2026-47075
GHSA-j9wq-vxxc-94wf

Published

2026-05-25T14:00:45.781Z

Modified

2026-05-25T14:26:25.703348252Z

Severity

6.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N CVSS Calculator

Summary

CR/LF injection in query parameter in hackney

Details

Summary

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 hackneyurl:makeurl/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 before 4.0.1.

Database specific

{
    "cpe_ids": [
        "cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"
    ],
    "cwe_ids": [
        "CWE-93"
    ],
    "capec_ids": [
        "CAPEC-105"
    ]
}

References

Credits

- tepel-chen - FINDER
- Benoit Chesneau - REMEDIATION_DEVELOPER
- Jonatan Männchen - ANALYST

Affected packages

Hex / hackney

Package

Name: hackney
Purl: pkg:hex/hackney

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.0.1

Affected versions

0.*

0.13.1

0.14.0

0.14.1

0.14.2

0.14.3

0.15.0

0.15.2

1.*

1.0.1

1.0.2

1.0.5

1.0.6

1.1.0

1.2.0

1.3.0

1.3.1

1.3.2

1.4.0

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.4.6

1.4.7

1.4.8

1.4.10

1.5.0

1.5.1

1.5.2

1.5.3

1.5.4

1.5.5

1.5.6

1.5.7

1.6.0

1.6.1

1.6.2

1.6.3

1.6.4

1.6.5

1.6.6

1.7.0

1.7.1

1.8.0

1.8.2

1.8.3

1.8.4

1.8.5

1.8.6

1.9.0

1.10.0

1.10.1

1.11.0

1.12.0

1.12.1

1.13.0

1.14.0

1.14.2

1.14.3

1.15.0

1.15.1

1.15.2

1.16.0

1.17.0

1.17.1

1.17.2

1.17.3

1.17.4

1.18.0

1.18.1

1.18.2

1.19.0

1.19.1

1.20.0

1.20.1

1.21.0

1.22.0

1.23.0

1.24.0

1.24.1

1.25.0

2.*

2.0.0-beta.1

2.0.0

2.0.1

3.*

3.0.0

3.0.1

3.0.2

3.0.3

3.1.0

3.1.1

3.1.2

3.2.0

3.2.1

4.*

4.0.0

Database specific

source

"https://cna.erlef.org/osv/EEF-CVE-2026-47075.json"

Git / github.com/benoitc/hackney