CVE-2026-24656 is a low-severity vulnerability affecting Apache Karaf Decanter, specifically related to the deserialization of untrusted data. The Decanter log socket collector exposes port 4560 without authentication, allowing potential attackers to exploit this configuration if the collector exposes allowed classes property. This vulnerability could lead to Denial of Service (DoS) conditions.
This issue affects any installations of Apache Karaf Decanter prior to version 2.12.0. Organizations that have not installed Decanter are not impacted by this vulnerability. It is crucial for users to upgrade to version 2.12.0, which resolves this security concern.
The CVSS score of 3.7 indicates a low severity level, but organizations should still consider the potential risks associated with this vulnerability. The lack of authentication on the exposed port can be a gateway for attackers, increasing the urgency for affected users to take action.
Organizations should prioritize patching immediately to prevent any exploitation that may arise from this vulnerability.
Vulnerability Details
The vulnerability is categorized under CWE-502, which relates to deserialization of untrusted data. The specific affected component is Apache Karaf Decanter, and the issue is documented to exist in all versions prior to 2.12.0. The vulnerability was published on January 26, 2026.
Technical Analysis
The root cause of this vulnerability stems from the log socket collector's exposure of an authentication-less port. Attackers may leverage this to send malicious serialized data, potentially leading to a DoS condition. The attack vector is over the network, and the attack complexity is classified as high, meaning that it requires specific conditions to exploit successfully.
No privileges are required to exploit this vulnerability, and user interaction is not necessary. The impact on availability is rated as low, indicating that while a successful attack could disrupt service, the overall effect may not be extensive.
Risk & Impact Analysis
Risk to organizations includes potential service disruptions due to DoS attacks. Although the CVSS score indicates a low severity, the nature of denial-of-service vulnerabilities can lead to significant operational impacts, especially in environments relying on real-time logging and monitoring. Organizations should assess their exposure to this vulnerability and consider the blast radius in terms of systems impacted by the Decanter log socket collector.
Given that this vulnerability is not currently included in the Known Exploited Vulnerabilities (KEV) catalog, the immediacy of exploitation may be lower. However, organizations should still schedule remediation to mitigate risks.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Apache Karaf Decanter prior to 2.12.0 are affected by this vulnerability. Users are advised to upgrade to version 2.12.0 to mitigate the risks associated with this issue.
Mitigation & Remediation
Organizations should upgrade to Apache Karaf Decanter version 2.12.0 or later. If immediate upgrade is not possible, consider implementing network controls to restrict access to port 4560 and monitor logs for any unusual activity. Regularly reviewing configurations and assessing the attack surface can also help in reducing exposure to such vulnerabilities.
For additional guidance on security best practices, organizations may explore resources on application security assessment and implement continuous monitoring to identify potential threats.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for any access to the Decanter log socket collector on port 4560. Look for unusual patterns of traffic or requests that may indicate attempts to exploit the deserialization vulnerability.
AppSecure Threat Intelligence Insight
The existence of CVE-2026-24656 highlights the ongoing challenges organizations face regarding the security of their logging systems. The deserialization of untrusted data remains a critical area for security teams to address, as it can lead to severe operational impacts. This incident underscores the importance of adhering to secure coding practices and validating input data.
As organizations move towards more automated and interconnected systems, understanding the implications of vulnerabilities like this becomes crucial. Implementing robust security measures and regular audits can help mitigate risks from similar vulnerabilities in the future.
For further reading on security vulnerabilities and best practices, refer to our guide on penetration testing methodology and consider implementing a comprehensive vulnerability management program.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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