jleehr canto-saas-api up to 2.x Path Variable Request::buildRequestUrl contentId path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in jleehr canto-saas-api up to 2.x. This affects the function Request::buildRequestUrl of the component Path Variable Handler. The manipulation of the argument contentId results in path traversal. This vulnerability is identified as CVE-2026-55374. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in jleehr canto-saas-api up to 2.x. Affected is the function Request::buildRequestUrl of the component Path Variable Handler. The manipulation of the argument contentId with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

canto-saas-api is a PHP library for interacting with the Canto SaaS API. Prior to version 3.0.0, Request::buildRequestUrl() joins values returned by Request::getPathVariables() without encoding individual path segments, including the scheme and contentId values used by GetContentDetailsRequest. When a consuming application supplies an untrusted path variable value, path traversal sequences, query delimiters, or fragment delimiters can change the destination endpoint before AbstractEndpoint::sendRequest() attaches the configured authentication token. An attacker who controls that path variable value through the consuming application can cause unintended reads or writes with the configured application's privileges on the same Canto instance, but applications that pass only trusted and validated identifiers are not exploitable. This issue is fixed in version 3.0.0.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-55374 since 06/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 3.0.0 eliminates this vulnerability.

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Productinfo

Type

• Automation Software

Vendor

• jleehr

Name

• canto-saas-api

Version

• 2.x

Website

• Product: https://github.com/jleehr/canto-saas-api/

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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