Apache InLong JDBC Vulnerabilities Enables Deserialization of Untrusted Data

Apache InLong, a comprehensive real-time data streaming platform, has been discovered to contain a moderate-severity security vulnerability affecting multiple versions of the software.

The newly identified CVE-2025-27522 represents a deserialization of untrusted data vulnerability that impacts Apache InLong versions 1.13.0 through 2.1.0, serving as a secondary mining bypass for a previously disclosed security flaw.

Security researchers yulate and m4x are credited with discovering this vulnerability, which has prompted the Apache Software Foundation to release immediate remediation guidance for affected users.

The security flaw, officially designated as CVE-2025-27522, affects a significant range of Apache InLong installations spanning from version 1.13.0 to 2.1.0.

This deserialization of untrusted data vulnerability allows potential attackers to exploit the way the software processes serialized data objects, potentially leading to remote code execution or other malicious activities.

The vulnerability has been classified with moderate severity, indicating that while the risk is significant, it may require specific conditions or elevated privileges to exploit successfully.

Apache InLong serves as a comprehensive data streaming platform designed for massive data ingestion, transformation, and distribution across enterprise environments.

The affected versions represent a substantial portion of recent releases, suggesting that many production environments could be vulnerable to this security flaw.

Organizations running Apache InLong in their data processing pipelines should immediately assess their current version deployments to determine exposure to this vulnerability.

Apache InLong Vulnerabilities

This newly discovered vulnerability represents a secondary mining bypass for CVE-2024-26579, indicating a sophisticated relationship between multiple security flaws within the Apache InLong codebase.

Secondary mining bypasses typically occur when security researchers discover alternative methods to exploit systems even after initial vulnerabilities have been patched, suggesting that the original fix for CVE-2024-26579 may have been incomplete or that related code paths remained vulnerable.

The connection between these two CVEs highlights the complex nature of deserialization vulnerabilities in modern software applications.

Deserialization attacks occur when applications process untrusted serialized data without proper validation, allowing attackers to manipulate the deserialization process to execute arbitrary code or compromise system integrity.

The fact that this represents a bypass of previous security measures underscores the importance of comprehensive security reviews and thorough testing of vulnerability fixes.

Mitigations

The Apache Software Foundation has provided clear remediation guidance for organizations affected by this vulnerability.

Users are strongly advised to upgrade to Apache InLong version 2.2.0, which contains the necessary security fixes to address both the current vulnerability and its relationship to the previous CVE-2024-26579.

For organizations unable to immediately upgrade to the latest version, the Apache team has provided a cherry-pick solution available through GitHub pull request #11732.

The cherry-pick approach allows administrators to apply the specific security fix to their current installations without requiring a full version upgrade, providing flexibility for environments with complex deployment requirements or extensive customizations.

However, upgrading to version 2.2.0 remains the recommended long-term solution, as it ensures comprehensive protection against both known vulnerabilities and includes additional security improvements implemented in the latest release.

Organizations should prioritize this security update based on their risk assessment and the criticality of their Apache InLong deployments within their data processing infrastructure.

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