CVE-2026-25747 in Camel
Summary
by MITRE • 02/23/2026
Deserialization of Untrusted Data vulnerability in Apache Camel LevelDB component.
The Camel-LevelDB DefaultLevelDBSerializer class deserializes data read from the LevelDB aggregation repository using java.io.ObjectInputStream without applying any ObjectInputFilter or class-loading restrictions. An attacker who can write to the LevelDB database files used by a Camel application can inject a crafted serialized Java object that, when deserialized during normal aggregation repository operations, results in arbitrary code execution in the context of the application. This issue affects Apache Camel: from 4.10.0 before 4.10.8, from 4.14.0 before 4.14.5, from 4.15.0 before 4.18.0.
Users are recommended to upgrade to version 4.18.0, which fixes the issue. For the 4.10.x LTS releases, users are recommended to upgrade to 4.10.9, while for 4.14.x LTS releases, users are recommended to upgrade to 4.14.5
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Analysis
by VulDB Data Team • 02/27/2026
The vulnerability described in CVE-2026-25747 represents a critical deserialization flaw within the Apache Camel LevelDB component that exposes applications to remote code execution risks. This issue manifests in the DefaultLevelDBSerializer class which processes data from LevelDB aggregation repositories using standard Java deserialization mechanisms. The vulnerability arises from the absence of proper input filtering and class loading restrictions when deserializing objects through java.io.ObjectInputStream. Attackers exploiting this weakness can manipulate LevelDB database files to inject malicious serialized Java objects that will execute arbitrary code when processed during normal application operations. The flaw specifically impacts Apache Camel versions across multiple release streams including 4.10.0 through 4.10.7, 4.14.0 through 4.14.4, and 4.15.0 through 4.17.9, making it a widespread concern for organizations utilizing these framework versions.
The technical implementation of this vulnerability aligns with CWE-502 which specifically addresses deserialization of untrusted data. This weakness allows attackers to leverage Java's serialization mechanism to execute malicious payloads through carefully crafted serialized objects. The attack vector requires that an attacker has write access to the LevelDB database files used by the Camel application, which could occur through various compromise scenarios including file system access violations, insecure configuration management, or other persistence mechanisms. When the vulnerable application processes aggregation repository operations, the malicious objects are automatically deserialized and executed within the application's security context, potentially enabling full system compromise. The vulnerability demonstrates a classic example of how insecure deserialization can bypass traditional security controls and provide attackers with direct execution capabilities.
The operational impact of CVE-2026-25747 extends beyond simple privilege escalation to encompass complete system compromise when exploited successfully. Applications using affected Camel versions become vulnerable to remote code execution attacks that can result in data theft, system modification, or complete service disruption. The vulnerability affects core aggregation functionality within Apache Camel, which is commonly used for message routing and processing in enterprise environments. Organizations running these vulnerable versions face significant risk as the attack requires minimal privileges to execute once an attacker gains write access to the LevelDB repository files. This makes the vulnerability particularly dangerous in environments where database file permissions are not properly enforced or where applications operate with elevated privileges.
Mitigation strategies for CVE-2026-25747 primarily focus on immediate version upgrades to patched releases. Users should upgrade to Apache Camel 4.18.0 for the latest stable releases, while maintaining LTS support requires upgrading to 4.10.9 for 4.10.x releases and 4.14.5 for 4.14.x releases. Beyond immediate upgrades, organizations should implement additional protective measures including restricting file system access to LevelDB repository directories, implementing proper access controls for database files, and monitoring for unauthorized modifications to persistence storage. The fix addresses the core deserialization issue by introducing proper object input filtering and restricting class loading mechanisms. Security teams should also consider implementing runtime monitoring for suspicious deserialization activities and conducting comprehensive vulnerability assessments of all Camel-based applications to identify potential exposure points. This vulnerability underscores the importance of secure coding practices and proper input validation in serialization mechanisms as outlined in the ATT&CK framework's defense against deserialization attacks.