CVE-2025-57802 is a high-severity vulnerability affecting version 1.0.0 of the Airlinklabs daemon, a component that interfaces with Docker and the management Panel to provide secure access and control over container instances. The vulnerability arises from improper handling of symbolic links (symlinks) within a mounted directory (/app/data) inside the container. Specifically, an attacker who has access to the affected container can create symlinks that point to arbitrary locations on the host filesystem because the container bind-mounts an arbitrary host path into /app/data. When the daemon or other processes follow these symlinks, the attacker can gain unauthorized read access to sensitive host files outside the container boundary. This breaks container isolation and can lead to information disclosure of critical host data. The vulnerability is classified under CWE-61 (Improper Restriction of Symbolic Links), indicating a failure to properly restrict or validate symlink targets. The issue has been patched in version 1.0.1 of the daemon. The CVSS v4.0 base score is 8.7 (high), reflecting network attack vector, low attack complexity, no privileges required beyond container access, no user interaction, and high impact on confidentiality, integrity, and availability due to unauthorized host file access. No known exploits are currently reported in the wild, but the potential for sensitive data exposure is significant given the nature of the vulnerability and the common use of containers in production environments.

For European organizations, this vulnerability poses a significant risk especially for those leveraging containerized environments managed by Airlinklabs daemon version 1.0.0. Unauthorized read access to host files can lead to exposure of sensitive corporate data, credentials, configuration files, or intellectual property. This can facilitate further lateral movement, privilege escalation, or targeted attacks within the organization's infrastructure. The breach of container isolation undermines one of the core security guarantees of containerization, potentially affecting compliance with GDPR and other data protection regulations due to unauthorized data access. Organizations in sectors such as finance, healthcare, critical infrastructure, and government are particularly at risk given the sensitivity of their data and regulatory requirements. The vulnerability could also disrupt operational availability if attackers leverage the information gained to conduct further attacks or sabotage. Although exploitation requires initial container access, many organizations deploy containers with varying levels of access control, making this a realistic threat in multi-tenant or shared environments.

1. Immediate upgrade to Airlinklabs daemon version 1.0.1 or later, which contains the patch that properly restricts symlink following and prevents unauthorized host file access. 2. Implement strict access controls and monitoring on container environments to limit who can access and modify container filesystems, especially mounted volumes. 3. Avoid bind-mounting arbitrary or sensitive host paths into containers unless absolutely necessary, and if required, restrict mount points to non-sensitive directories with minimal permissions. 4. Employ container security tools that detect and alert on suspicious symlink creation or unusual file access patterns within containers. 5. Use container runtime security policies (e.g., seccomp, AppArmor, SELinux) to restrict daemon and container process capabilities related to filesystem access. 6. Conduct regular audits of container configurations and mounted volumes to ensure no unauthorized symlinks or mounts exist. 7. Educate DevOps and security teams about the risks of symlink attacks and the importance of secure container volume management. 8. Consider network segmentation and zero-trust principles to limit the impact if a container is compromised.