CVE WatchSep 15, 2026

CVE-2026-55375

canto-saas-api is a PHP library for interacting with the Canto SaaS API. Prior to version 3.0.0, OAuth2Request::getQueryParams() places app_

CVSS

5.3

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 15, 2026 · Last modified: Sep 15, 2026 · CWE-209 · CWE-598

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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