CVE-2026-115708 in Cloud Enterprise
Summary
by MITRE • 10/29/2026
Improper Link Resolution Before File Access ('Link Following') (CWE-59) in Elastic Cloud Enterprise (ECE) can lead to authentication bypass and unauthorized changes to the configuration of other deployments on the same host via Symlink Attack (CAPEC-132).
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified as CWE-59, commonly known as Improper Link Resolution Before File Access or symlink following, represents a critical security flaw within Elastic Cloud Enterprise. This issue stems from an application logic error where the software fails to properly validate symbolic links before performing file system operations. In standard operating systems, a symbolic link acts as a pointer that redirects access requests to a different target path on the disk. When an application does not verify whether this target is outside of its intended directory scope or resolves to sensitive system files prior to opening them, it creates a pathway for attackers to manipulate which resources are accessed and modified. This specific flaw in Elastic Cloud Enterprise allows for significant security breaches because the software trusts user-supplied paths without sufficient sanitization checks against path traversal techniques.
The operational impact of this vulnerability is severe due to its potential for authentication bypass and unauthorized configuration changes. An attacker with access to a deployment on the same host can exploit this symlink weakness to redirect file operations toward sensitive areas of the system or other deployments' data directories. By crafting malicious symbolic links, an adversary can trick the application into reading or writing files that it should not have permission to touch. This capability effectively allows the attacker to bypass authentication mechanisms by manipulating configuration files or session tokens stored in accessible locations. Consequently, this leads to unauthorized changes in the configurations of other deployments sharing the same host infrastructure, compromising their integrity and availability without requiring direct administrative credentials for those specific services.
From a threat modeling perspective, this vulnerability aligns with CAPEC-132, which describes Symlink Attacks where an attacker exploits improper handling of symbolic links to gain access to restricted files or directories. The attack vector typically involves creating a symlink in a directory that the vulnerable application monitors or processes, pointing it toward a target file such as a configuration file for another tenant's deployment or a system credential store. When Elastic Cloud Enterprise attempts to resolve this link during normal operation, it follows the pointer rather than recognizing the malicious redirection. This behavior is particularly dangerous in multi-tenant environments where isolation between deployments is paramount. The lack of strict path canonicalization and validation allows lateral movement across tenants, violating the principle of least privilege and compromising data confidentiality and integrity across the entire cluster hosted on that node.
Mitigation strategies for this vulnerability require both immediate patching and long-term architectural improvements. Elastic Corporation has released updates to address these specific code paths where link resolution occurs without adequate verification. Administrators must ensure that all nodes in their clusters are updated to the latest secure version of Elastic Cloud Enterprise immediately upon availability. Beyond software updates, defense-in-depth measures should be implemented at the operating system level. This includes configuring file systems with options such as noexec and nosuid on directories containing application data to limit the impact if a symlink is successfully created. Additionally, implementing strict access controls using SELinux or AppArmor profiles can restrict which processes are allowed to follow symbolic links in sensitive directories. Regular auditing of file permissions and monitoring for unusual creation patterns of symbolic links within application directories will also help detect potential exploitation attempts early.