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canto-saas-api: Authenticated API requests can be redirected via unencoded path variables

CVSS 3.1 4.8 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-55374

Published

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.

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Affected versions, risk and source history

cve-program · CVE-2026-55374

Published

canto-saas-api

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "jleehr",
                    "product": "canto-saas-api",
                    "versions": [
                        {
                            "version": "< 3.0.0",
                            "status": "affected"
                        }
                    ]
                }

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Sources read 13 Nov 13:11 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current