sporkmonger Addressable up to 2.9.0 Path Normalization URI.normalize_path denial of service

Summaryinfo

A vulnerability marked as problematic has been reported in sporkmonger Addressable up to 2.9.0. This affects the function Addressable::URI.normalize_path of the component Path Normalization. The manipulation leads to denial of service. This vulnerability is traded as CVE-2026-126351. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in sporkmonger Addressable up to 2.9.0 and classified as problematic. This issue affects the function Addressable::URI.normalize_path of the component Path Normalization. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. Prior to 2.9.1, Addressable::URI.normalize_path repeatedly scans and rewrites paths while removing only one nested dot segment per pass, producing quadratic work. URI#normalize, URI#normalized_path, URI#join, URI#==, and URI#=== inherit the behavior, so processing a sufficiently long attacker-controlled URI can consume a worker thread and cause denial of service on every Ruby implementation. URI.parse alone and code that never normalizes, compares, or joins untrusted URIs are unaffected. This issue is fixed in version 2.9.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-126351 since 11/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 2.9.1 eliminates this vulnerability.

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Productinfo

Vendor

• sporkmonger

Name

• Addressable

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9.0

Website

• Product: https://github.com/sporkmonger/addressable/

CPE 2.3info

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CPE 2.2info

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