lostisland faraday up to 1.10.5/2.14.2 Common Interface NestedParamsEncoder recursion

Summaryinfo

A vulnerability marked as problematic has been reported in lostisland faraday up to 1.10.5/2.14.2. This affects the function Faraday::NestedParamsEncoder of the component Common Interface. Performing a manipulation results in recursion. This vulnerability was named CVE-2026-54297. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in lostisland faraday up to 1.10.5/2.14.2. This affects the function Faraday::NestedParamsEncoder of the component Common Interface. The manipulation with an unknown input leads to a recursion vulnerability. CWE is classifying the issue as CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. This is going to have an impact on availability. The summary by CVE is:

Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. From 1.0.0 until 1.10.6 and 2.14.3, Faraday::NestedParamsEncoder, the default nested query parameter encoder/decoder in Faraday, decodes nested query strings without enforcing a maximum nesting depth. A crafted query string causes Faraday to build a deeply nested Ruby Hash structure. The internal dehash routine then recursively walks this attacker-controlled structure without a depth limit. At sufficient depth, Ruby raises an uncaught SystemStackError (stack level too deep), crashing the calling thread or worker. This can lead to denial of service in applications that pass attacker-controlled query strings to Faraday's nested query parsing or URL-building paths. This vulnerability is fixed in 1.10.6 and 2.14.3.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-54297 since 06/12/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.10.6 or 2.14.3 eliminates this vulnerability.

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Productinfo

Vendor

• lostisland

Name

• faraday

Version

• 1.10.0
• 1.10.1
• 1.10.2
• 1.10.3
• 1.10.4
• 1.10.5
• 2.14.0
• 2.14.1
• 2.14.2

Website

• Product: https://github.com/lostisland/faraday/

CPE 2.3info

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CPE 2.2info

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