Unprotected Transport of Credentials Affecting oauth2 package, versions >=0.4.0, <2.0.22
Threat Intelligence
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Test your applications- Snyk IDSNYK-RUBY-OAUTH2-17275796
- published10 Jun 2026
- disclosed6 Jun 2026
- credittonghuaroot
Introduced: 6 Jun 2026
New CVE NOT AVAILABLE CWE-523 (opens in a new tab)How to fix?
Upgrade oauth2 to version 2.0.22 or higher.
Overview
Affected versions of this package are vulnerable to Unprotected Transport of Credentials in the request() function in client.rb, which exposes the Authorization: Bearer value. An attacker in control of a malicious endpoint that is the target of redirects can supply a Location header in a redirect response that uses a protocol-relative URI (starting with //), to obtain the authorization token when a user sends a request. This is caused by an unprotected URI#merge() operation.