A significant security vulnerability has been discovered in Dozzle, a realtime log viewer for Docker containers. This vulnerability allows users with restricted access to bypass security measures and obtain an interactive root shell in containers that should be out of their scope. Specifically, prior to version 9.0.3, a flaw in Dozzle's agent-backed shell endpoints could be exploited by targeting container IDs directly, leading to unauthorized access to sensitive environments.
The severity of this vulnerability is classified as high, with a CVSS score of 8.7. This score indicates a substantial risk to organizations using affected versions of Dozzle, particularly those that rely on label filters for managing access to their containerized applications. The potential for exploitation is high, and attackers may leverage this weakness to gain control over critical systems.
With the vulnerability's exploitation status currently unconfirmed, organizations should take proactive measures to mitigate the risk. The urgency is underscored by the fact that this vulnerability could lead to substantial organizational impact, particularly in environments where sensitive data is stored within Docker containers.
Organizations should prioritize patching immediately, as version 9.0.3 of Dozzle addresses this issue directly. Failure to apply the necessary updates could leave systems exposed to potential exploitation, significantly increasing the risk of data breaches and operational disruptions.
Vulnerability Details
The vulnerability in Dozzle allows users, restricted by label filters, to gain unauthorized access to out-of-scope containers. This is classified under CWE-284 (Improper Access Control) and CWE-863 (Authorization Bypass). The flaw was published on January 27, 2026, and was last modified on February 19, 2026.
The CVSS score for this vulnerability is 8.7 based on version 4.0, indicating high severity. It has a low attack complexity, requires low privileges, and does not require user interaction. The confidentiality and integrity impacts are both high, emphasizing the critical nature of this vulnerability.
Technical Analysis
The root cause of this vulnerability lies in the flawed access control mechanism of Dozzle's agent-backed shell endpoints. Attackers can exploit this weakness by targeting the container IDs of out-of-scope containers, effectively bypassing the intended restrictions. The attack vector is network-based, which means the potential for exploitation is high in environments where network access is not adequately controlled.
The attack complexity is low, as the vulnerability can be exploited without significant effort. Privileges required are low, allowing users with minimal access to exploit this flaw. No user interaction is necessary, making it easier for attackers to execute their plans. The impacts on confidentiality and integrity are high, underscoring the severity of this vulnerability.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is significant, especially for organizations that manage sensitive data within Docker containers. The potential for unauthorized access to critical systems can lead to data breaches, operational disruptions, and significant financial losses. Given the high CVSS score, organizations should assess their exposure and prioritize this vulnerability within their risk management frameworks.
The urgency for remediation is elevated due to the high severity of the vulnerability. Organizations should consider implementing immediate patching protocols to mitigate risks associated with this flaw. In addition, organizations should review their access control mechanisms and ensure that network security measures are in place to prevent unauthorized access to Docker containers.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects Dozzle versions prior to 9.0.3. Organizations using these versions are at risk and should upgrade to the latest version to ensure their systems are protected.
Mitigation & Remediation
To mitigate the risks associated with this vulnerability, organizations should upgrade to Dozzle version 9.0.3 or later, which contains the necessary patch. Additionally, organizations should review their access control configurations for Docker containers and implement hardening measures to restrict unauthorized access.
Organizations may also benefit from conducting regular security assessments to identify potential vulnerabilities in their containerized applications. For further guidance on security testing, organizations can refer to penetration testing services that can help in identifying and remediating security weaknesses.
Detection Guidance
Organizations should monitor logs for any unauthorized access attempts to Docker containers. Behavioral anomalies, such as unexpected shell access requests from restricted users, should be flagged for further investigation. Implementing network signatures to detect unusual container interactions can also be beneficial.
AppSecure Threat Intelligence Insight
The discovery of this vulnerability in Dozzle highlights the ongoing issues surrounding access control in containerized environments. Organizations must remain vigilant and proactive in their security posture to mitigate risks associated with such vulnerabilities. This case represents a trend where misconfigurations and inadequate access controls can lead to significant security incidents.
Security teams should ensure that access controls are reviewed and updated regularly to reflect changes in organizational structure and technology. For more insights into managing vulnerabilities, organizations can refer to vulnerability management programs that can enhance their overall security posture. Additionally, understanding the implications of container security is crucial for maintaining a robust defense against potential threats, as discussed in the cloud penetration testing guide. Emphasizing secure configuration practices will help organizations safeguard their containerized applications.
Lastly, leveraging robust security frameworks will aid in mitigating risks associated with vulnerabilities like CVE-2026-24740. Organizations should consider exploring penetration testing methodologies to ensure comprehensive security evaluations.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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