---
id: CVE-2026-55374
title: canto-saas-api is a PHP library for interacting with the Canto SaaS API
summary: >-
  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 sch…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-74
  - CWE-918
vendor: jleehr
product: canto-saas-api
affected:
  - canto-saas-api < 3.0.0
patched:
  - jleehr/canto-saas-api 3.0.0
published: '2026-09-15'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T20:17:20.780'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55374'
references:
  - url: >-
      https://github.com/jleehr/canto-saas-api/commit/300559fdae5d1bed2dc00a6477f5996833a77339
    label: security-advisories@github.com
  - url: 'https://github.com/jleehr/canto-saas-api/releases/tag/3.0.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/jleehr/canto-saas-api/security/advisories/GHSA-9qfv-wgh2-m6p8
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-9qfv-wgh2-m6p8'
tags:
  - nvd
  - cve.org
  - ghsa
  - composer
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T18:57:35.795603Z'
ecosystem: composer
ingestedAt: '2026-06-22T15:59:08.202Z'
epss: 0.00228
epssPercentile: 0.13858
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55374)

Affected packages:

- `jleehr/canto-saas-api <= 2.0.0`

Patched in:

- `jleehr/canto-saas-api 3.0.0`

Source: https://github.com/advisories/GHSA-9qfv-wgh2-m6p8