CVE-2026-16336
Description
A flaw was found in Trino's OAuth2/OIDC component. A remote attacker can exploit this vulnerability by manipulating the redirect_uri argument, leading to an open redirect. This could allow an attacker to redirect users to malicious websites, potentially enabling phishing attacks or credential theft.
Statement
Red Hat products that include the Trino Python client library (PyPI trino) are not affected by this vulnerability. The flaw exists exclusively in the Trino Java server's OAuth2/OIDC authentication handler (ExternalUriInfo.java in core/trino-main), which constructs OAuth redirect URIs from HTTP request headers without proper validation. The Python client library does not contain this server-side code.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism; Gain Privileges or Assume Identity
The user may be redirected to an untrusted page that contains malware which may then compromise the user's system. In some cases, an open redirect can also enable the immediate download of a file without the user's permission, because the redirection to an external site may lead to endpoints on those sites that automatically trigger a download action ("drive-by download" [REF-1478]). This will expose the user to extensive risk. The user's interaction with the web server may also be compromised if the malware conducts keylogging or other attacks that steal credentials, personally identifiable information (PII), or other important data.
Access Control,Confidentiality,Other
Technical Impact: Bypass Protection Mechanism; Gain Privileges or Assume Identity; Other
By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam. The user may be subjected to phishing attacks by being redirected to an untrusted page. The phishing attack may point to an attacker controlled web page that appears to be a trusted web site. The phishers may then steal the user's credentials and then use these credentials to access the legitimate web site. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
