Vulnerability Description
canto-saas-api is a PHP library for interacting with the Canto SaaS API. Prior to version 3.0.0, OAuth2Request::getQueryParams() places app_id, app_secret, refresh_token, and code in the URL query string of token POST requests, allowing access logs, proxy logs, and APM traces to persist the credentials in plaintext. When a token request fails, OAuth2::obtainAccessToken() also passes the credential-bearing Guzzle request URI into AuthorizationFailedException, so application logs and error trackers can record the same secrets. An attacker with access to affected telemetry can obtain Canto credentials and use them to request access tokens for the tenant. This issue is fixed in version 3.0.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/jleehr/canto-saas-api/commit/300559fdae5d1bed2dc00a6477f59968
- https://github.com/jleehr/canto-saas-api/releases/tag/3.0.0
- https://github.com/jleehr/canto-saas-api/security/advisories/GHSA-37pm-83g7-r22v
FAQ
What is CVE-2026-55375?
CVE-2026-55375 is a vulnerability with a CVSS score of 5.3 (MEDIUM). canto-saas-api is a PHP library for interacting with the Canto SaaS API. Prior to version 3.0.0, OAuth2Request::getQueryParams() places app_id, app_secret, refresh_token, and code in the URL query str...
How severe is CVE-2026-55375?
CVE-2026-55375 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55375?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.