CVE-2026-16336 in trino
Summary
by MITRE • 07/21/2026
A vulnerability was found in trinodb trino 481. Affected is an unknown function of the file core/trino-main/src/main/java/io/trino/server/ExternalUriInfo.java of the component OAuth2/OIDC. Performing a manipulation of the argument redirect_uri results in open redirect. It is possible to initiate the attack remotely. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 07/21/2026
This vulnerability exists within the Trino platform version 481, specifically affecting the OAuth2/OIDC authentication component located in the core/trino-main/src/main/java/io/trino/server/ExternalUriInfo.java file. The flaw represents a classic open redirect vulnerability that occurs when the system fails to properly validate or sanitize the redirect_uri parameter during OAuth2/OIDC authentication flows. This type of vulnerability is categorized under CWE-601, which specifically addresses open redirect vulnerabilities where applications redirect users to untrusted domains without proper validation.
The technical implementation flaw stems from insufficient input validation in the ExternalUriInfo.java component that processes OAuth2/OIDC redirect URIs. When an attacker manipulates the redirect_uri argument, the system accepts the malicious value without verifying that it originates from a trusted domain or matches the configured allowed redirect URIs. This allows attackers to craft specially formatted authentication requests that will redirect users to arbitrary third-party domains, potentially enabling phishing attacks or credential theft attempts.
The operational impact of this vulnerability is significant as it can be exploited remotely without requiring any privileged access or authentication. Attackers can leverage this weakness to perform social engineering campaigns by creating fake authentication pages that appear legitimate to users. The vulnerability affects the entire Trino ecosystem since OAuth2/OIDC authentication is commonly used for securing access to data platforms, making it a critical concern for organizations relying on Trino for their data analytics infrastructure. This open redirect can be particularly dangerous in enterprise environments where sensitive data is accessed through Trino.
The security implications extend beyond simple redirection attacks as this vulnerability can enable more sophisticated attack vectors including credential harvesting through phishing campaigns or man-in-the-middle attacks that exploit the trust relationship between the authentication system and users. Organizations should immediately implement mitigations such as configuring strict redirect URI validation rules, implementing proper input sanitization for all OAuth2/OIDC parameters, and ensuring that only pre-approved redirect URIs are accepted. Additionally, monitoring logs for suspicious redirect patterns and implementing security headers like Content Security Policy can help detect and prevent exploitation attempts.
According to ATT&CK framework, this vulnerability maps to T1566 (Phishing) and T1071.004 (Application Layer Protocol: DNS), as attackers could use the open redirect to direct users to malicious domains for credential theft or further attack delivery. The lack of response from the Trino project community regarding this issue represents a significant gap in vulnerability management, potentially leaving organizations exposed to active exploitation attempts while waiting for official patches or updates to address the root cause in the ExternalUriInfo.java component.
Organizations should consider implementing temporary workarounds such as disabling OAuth2/OIDC authentication until proper patches are available, restricting access to Trino through network segmentation, and conducting thorough security audits of all OAuth2/OIDC configurations. The vulnerability serves as a reminder of the critical importance of validating all user-supplied input in authentication flows and demonstrates how seemingly minor validation flaws can create substantial security risks in enterprise data platforms.