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CVE-2026-54297

Faraday denial of service

7.5 HIGHPublic exploitEPSS 0.76%
  1. Published24 Jun 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Faraday≥ 1.0.0 < 1.10.6 · ≥ 2.0.0 < 2.14.3

Remediation

Fixed in
Faraday≥ 1.10.6

References

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Frequently asked

Is CVE-2026-54297 being actively exploited?

CVE-2026-54297 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.76%.

How severe is CVE-2026-54297?

CVE-2026-54297 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.76% probability of exploitation.

Which products are affected by CVE-2026-54297?

Affected products include Faraday.

How do I fix CVE-2026-54297?

Upgrade affected software to a fixed version, for example Faraday 1.10.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.