Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. Prior to 2.14.1, Faraday's build_exclusive_url method (in lib/faraday/connection.rb) uses Ruby's URI#merge to combine the connection's base URL with a user-supplied path. Per RFC 3986, protocol-relative URLs (e.g. //evil.com/path) are treated as network-path references that override the base URL's host/authority component. This means that if any application passes user-controlled input to Faraday's get(), post(), build_url(), or other request methods, an attacker can supply a protocol-relative URL like //attacker.com/endpoint to redirect the request to an arbitrary host, enabling Server-Side Request Forgery (SSRF). This vulnerability is fixed in 2.14.1.

An update of the rubygem package has been released.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters.
    Prior to 2.14.1, Faraday's build_exclusive_url method (in lib/faraday/connection.rb) uses Ruby's URI#merge
    to combine the connection's base URL with a user-supplied path. Per RFC 3986, protocol-relative URLs (e.g.
    //evil.com/path) are treated as network-path references that override the base URL's host/authority
    component. This means that if any application passes user-controlled input to Faraday's get(), post(),
    build_url(), or other request methods, an attacker can supply a protocol-relative URL like
    //attacker.com/endpoint to redirect the request to an arbitrary host, enabling Server-Side Request Forgery
    (SSRF). This vulnerability is fixed in 2.14.1. (CVE-2026-25765)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters.
    Prior to 2.14.1, Faraday's build_exclusive_url method (in lib/faraday/connection.rb) uses Ruby's URI#merge     to combine the connection's base URL with a user-supplied path. Per RFC 3986, protocol-relative URLs (e.g.
    //evil.com/path) are treated as network-path references that override the base URL's host/authority     component. This means that if any application passes user-controlled input to Faraday's get(), post(),     build_url(), or other request methods, an attacker can supply a protocol-relative URL like     //attacker.com/endpoint to redirect the request to an arbitrary host, enabling Server-Side Request Forgery     (SSRF). This vulnerability is fixed in 2.14.1. (CVE-2026-25765)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
333801	Photon OS 5.0: Rubygem PHSA-2026-5.0-92-0762	Nessus	PhotonOS Local Security Checks	Local	medium
332536	Photon OS 5.0: Rubygem PHSA-2026-5.0-91-0762	Nessus	PhotonOS Local Security Checks	Local	medium
332199	Photon OS 5.0: Rubygem PHSA-2026-5.0-90-0762	Nessus	PhotonOS Local Security Checks	Local	medium
299048	Photon OS 5.0: Rubygem PHSA-2026-5.0-0762	Nessus	PhotonOS Local Security Checks	Local	medium
437661	SCA: security update for faraday (GHSA-33mh-2634-fwr2)	Tenable Cloud Security	SCA Checks	Local	medium
437661	SCA: security update for faraday (GHSA-33mh-2634-fwr2)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
298451	Linux Distros Unpatched Vulnerability : CVE-2026-25765	Nessus	Misc.	Local	medium

Detections

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CVE-2026-25765

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Tenable Plugins

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