REDHAT-BUG-2492252: High severity Ruby Faraday vulnerability

Published Jun 24, 2026
·
Updated

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.

Affected Software

1 affected component
Ruby Faraday

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Faraday to a version that resolves this vulnerability.

    Fixed in 1.10.6
  2. Upgrade

    Upgrade Faraday to a version that resolves this vulnerability.

    Fixed in 2.14.3

Event History

Jun 24, 2026
Data Sourced
via Red Hat·05:01 PM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2492252?

The severity of REDHAT-BUG-2492252 is high with a score of 7.

2

How do I fix REDHAT-BUG-2492252?

To fix REDHAT-BUG-2492252, upgrade the Faraday library to a version higher than 1.10.6 and 2.14.3.

3

What does REDHAT-BUG-2492252 affect?

REDHAT-BUG-2492252 affects the Ruby Faraday library versions from 1.0.0 until 1.10.6 and 2.14.3.

4

What vulnerability is described in REDHAT-BUG-2492252?

REDHAT-BUG-2492252 describes a flaw in Faraday::NestedParamsEncoder that allows decoding nested query strings without maximum nesting enforcement.

5

When was REDHAT-BUG-2492252 published?

REDHAT-BUG-2492252 was published on June 24, 2026.

Contact

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