CVE-2026-5485 Overview
CVE-2026-5485 is an OS command injection vulnerability in the browser-based authentication component of the Amazon Athena ODBC driver on Linux systems. Versions prior to 2.0.5.1 are affected by this flaw, which could allow a threat actor to execute arbitrary code by crafting malicious connection parameters that the driver processes during local user-initiated connections.
The vulnerability exists within the authentication flow, where specially crafted connection parameters are not properly sanitized before being passed to system commands. This can lead to arbitrary command execution in the context of the user running the ODBC driver.
Critical Impact
Successful exploitation allows attackers to execute arbitrary OS commands on vulnerable Linux systems running affected versions of the Amazon Athena ODBC driver, potentially leading to complete system compromise.
Affected Products
- Amazon Athena ODBC driver versions prior to 2.0.5.1 on Linux
Discovery Timeline
- April 3, 2026 - CVE-2026-5485 published to NVD
- April 7, 2026 - Last updated in NVD database
Technical Details for CVE-2026-5485
Vulnerability Analysis
This vulnerability is classified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS command injection. The flaw resides in the browser-based authentication component of the Amazon Athena ODBC driver on Linux systems.
The browser-based authentication mechanism processes connection parameters that users or applications supply when establishing database connections. The driver fails to properly sanitize these parameters before incorporating them into system command executions, creating an injection point where malicious shell metacharacters or commands can be inserted.
Exploitation requires local access and user interaction, as the malicious connection parameters must be loaded by the driver during a user-initiated connection. This could occur through social engineering attacks where users are tricked into importing malicious DSN configurations or connecting with attacker-supplied connection strings.
Root Cause
The root cause of CVE-2026-5485 is improper input validation and sanitization in the browser-based authentication component. Connection parameters are passed directly to OS command execution functions without adequate escaping or filtering of shell metacharacters. This allows attackers to break out of the intended command context and inject arbitrary commands that execute with the privileges of the user running the ODBC driver.
Attack Vector
The attack vector is local, requiring the attacker to either have local access to the system or to convince a legitimate user to use malicious connection parameters. The attack flow typically involves:
- An attacker crafts a malicious ODBC connection string containing shell metacharacters or embedded commands within authentication parameters
- A user initiates a connection to Amazon Athena using the vulnerable driver with these parameters
- The browser-based authentication component processes these parameters without proper sanitization
- The injected commands execute on the underlying Linux system with the user's privileges
The vulnerability specifically affects the browser authentication workflow, where the driver may invoke external processes to handle authentication tokens or browser interactions. For technical details on the vulnerability mechanism, refer to the AWS Security Bulletin 2026-013.
Detection Methods for CVE-2026-5485
Indicators of Compromise
- Unusual process spawning from the Athena ODBC driver process
- Unexpected shell command executions following ODBC connection attempts
- Suspicious connection strings in ODBC configuration files or DSN entries containing shell metacharacters
- Anomalous network activity or file system modifications coinciding with Athena driver usage
Detection Strategies
- Monitor for child process creation from the Amazon Athena ODBC driver binary, particularly shell invocations
- Audit ODBC DSN configurations and connection strings for suspicious characters such as backticks, semicolons, pipes, and command substitution patterns
- Implement endpoint detection rules to identify command injection patterns in process command lines
- Review authentication logs for anomalous browser-based authentication attempts
Monitoring Recommendations
- Enable process auditing on Linux systems using the Athena ODBC driver
- Configure SentinelOne agents to monitor for suspicious process trees originating from ODBC driver processes
- Implement file integrity monitoring on ODBC configuration directories
- Log and alert on any shell commands executed in the context of database connection operations
How to Mitigate CVE-2026-5485
Immediate Actions Required
- Upgrade the Amazon Athena ODBC driver to version 2.0.5.1 or later immediately
- Audit existing ODBC DSN configurations for any suspicious or unexpected connection parameters
- Review recent connection logs to identify any potential exploitation attempts
- Consider temporarily disabling browser-based authentication if immediate patching is not possible
Patch Information
Amazon has released version 2.0.5.1 of the Athena ODBC driver that addresses this vulnerability. Users should upgrade to this version or later to remediate the issue. Updated drivers are available for multiple platforms:
- Linux: Amazon Athena ODBC Linux Driver
- macOS Intel: Amazon Athena ODBC Mac Intel Driver
- macOS ARM: Amazon Athena ODBC Mac ARM Driver
- Windows: Amazon Athena ODBC Windows Driver
For complete release notes and additional information, see the AWS Athena ODBC Driver Release Notes.
Workarounds
- Use alternative authentication methods that do not rely on the browser-based authentication component
- Restrict which users and applications can configure ODBC connection strings on affected systems
- Implement application-level input validation for any connection parameters before passing them to the driver
- Deploy endpoint protection solutions to detect and block command injection attempts
# Verify current Athena ODBC driver version on Linux
rpm -qa | grep -i athena
# Expected output for patched version: AmazonAthenaODBC-2.0.5.1 or later
# Update to the latest version
sudo rpm -U AmazonAthenaODBC-2.1.0.0.rpm
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
