Vulnerability Details CVE-2026-33637
Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. Versions 2.0.0 through 2.14.1 still allow protocol-relative host override when the request target is passed as a URI object (rather than a String) to Faraday::Connection#build_exclusive_url. This bypasses the February 2026 fix for GHSA-33mh-2634-fwr2 and enables off-host request forgery: a request built from a fixed-base Faraday::Connection can be redirected to an attacker-controlled host, forwarding connection-scoped values such as Authorization headers and default query parameters. This issue has been fixed in version 2.14.3.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.3%
CVSS Severity
References
Products affected by CVE-2026-33637
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cpe:2.3:a:faraday_project:faraday:2.0.0
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cpe:2.3:a:faraday_project:faraday:2.0.1
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cpe:2.3:a:faraday_project:faraday:2.1.0
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cpe:2.3:a:faraday_project:faraday:2.10.0
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cpe:2.3:a:faraday_project:faraday:2.10.1
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cpe:2.3:a:faraday_project:faraday:2.11.0
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cpe:2.3:a:faraday_project:faraday:2.12.0
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cpe:2.3:a:faraday_project:faraday:2.12.1
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cpe:2.3:a:faraday_project:faraday:2.12.2
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cpe:2.3:a:faraday_project:faraday:2.12.3
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cpe:2.3:a:faraday_project:faraday:2.13.0
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cpe:2.3:a:faraday_project:faraday:2.13.1
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cpe:2.3:a:faraday_project:faraday:2.13.2
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cpe:2.3:a:faraday_project:faraday:2.13.3
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cpe:2.3:a:faraday_project:faraday:2.13.4
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cpe:2.3:a:faraday_project:faraday:2.14.0
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cpe:2.3:a:faraday_project:faraday:2.14.1
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cpe:2.3:a:faraday_project:faraday:2.2.0
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cpe:2.3:a:faraday_project:faraday:2.3.0
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cpe:2.3:a:faraday_project:faraday:2.4.0
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cpe:2.3:a:faraday_project:faraday:2.5.0
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cpe:2.3:a:faraday_project:faraday:2.5.1
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cpe:2.3:a:faraday_project:faraday:2.5.2
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cpe:2.3:a:faraday_project:faraday:2.6.0
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cpe:2.3:a:faraday_project:faraday:2.7.0
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cpe:2.3:a:faraday_project:faraday:2.7.1
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cpe:2.3:a:faraday_project:faraday:2.7.10
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cpe:2.3:a:faraday_project:faraday:2.7.11
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cpe:2.3:a:faraday_project:faraday:2.7.12
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cpe:2.3:a:faraday_project:faraday:2.7.2
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cpe:2.3:a:faraday_project:faraday:2.7.3
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cpe:2.3:a:faraday_project:faraday:2.7.4
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cpe:2.3:a:faraday_project:faraday:2.7.5
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cpe:2.3:a:faraday_project:faraday:2.7.6
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cpe:2.3:a:faraday_project:faraday:2.7.7
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cpe:2.3:a:faraday_project:faraday:2.7.8
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cpe:2.3:a:faraday_project:faraday:2.7.9
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cpe:2.3:a:faraday_project:faraday:2.8.0
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cpe:2.3:a:faraday_project:faraday:2.8.1
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cpe:2.3:a:faraday_project:faraday:2.9.0
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cpe:2.3:a:faraday_project:faraday:2.9.1
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cpe:2.3:a:faraday_project:faraday:2.9.2