CVE-2022-1650 in eventsource
Summary
by MITRE • 05/12/2022
Improper Removal of Sensitive Information Before Storage or Transfer in GitHub repository eventsource/eventsource prior to v2.0.2.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 04/29/2026
The vulnerability identified as CVE-2022-1650 represents a critical flaw in the eventsource library maintained by GitHub, specifically affecting versions prior to v2.0.2. This issue falls under the category of improper handling of sensitive data during storage or transfer operations, creating potential security risks for applications that rely on this library for server-sent events functionality. The eventsource library is commonly used in web applications to establish persistent connections between clients and servers, enabling real-time data streaming from server to client. The vulnerability manifests when sensitive information is not properly sanitized or removed before being stored or transferred through the library's data handling mechanisms.
The technical root cause of this vulnerability stems from inadequate data sanitization processes within the eventsource library's implementation. When processing server-sent events, the library fails to properly strip or encrypt sensitive data elements before they are committed to storage or transmitted over network connections. This flaw allows potentially confidential information to persist in memory structures, log files, or network packets that are processed by the library. The vulnerability is particularly concerning because it operates at the data handling layer where sensitive information flows through the application's data pipeline, creating multiple potential attack vectors for threat actors who might exploit this weakness to extract confidential data.
The operational impact of CVE-2022-1650 extends beyond simple data exposure, as it creates opportunities for attackers to harvest sensitive information from applications using vulnerable versions of the eventsource library. This includes but is not limited to authentication tokens, session identifiers, personal data, and other confidential information that may be inadvertently included in server-sent events. The vulnerability is particularly dangerous in environments where applications process user data or handle authentication flows, as it could enable attackers to reconstruct user sessions or extract credentials from improperly handled data streams. The flaw affects applications across various deployment scenarios including web applications, microservices architectures, and distributed systems that utilize server-sent events for real-time communication.
Security practitioners should prioritize the remediation of this vulnerability by upgrading to eventsource version 2.0.2 or later, which contains the necessary patches to address the sensitive data handling issue. The mitigation strategy should include comprehensive testing of all applications using the affected library to ensure proper data sanitization occurs during event processing. Organizations should also implement monitoring solutions to detect potential exploitation attempts and establish incident response procedures for handling sensitive data exposure incidents. This vulnerability aligns with CWE-200, which addresses improper handling of sensitive information, and can be mapped to ATT&CK technique T1567 for exfiltration through server-sent events, emphasizing the need for robust data protection measures in real-time communication systems. The remediation process should involve thorough code reviews of applications that utilize the eventsource library to identify any custom implementations that might be vulnerable to similar issues.