CVE-2026-111701 in Nubase
Summary
by MITRE • 10/16/2026
OtterMind Nubase through 0.1.4 contains a missing authentication vulnerability that allows unauthenticated attackers to access private bucket objects because /storage/v1/object/{bucketId}/{path} is treated as public for every HTTP method. Attackers knowing a tenant subdomain, bucket id and object path can download objects from private buckets and delete stored objects without an apikey or JWT.
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Analysis
by VulDB Data Team • 10/17/2026
The vulnerability identified in OtterMind Nubase versions through 0.1.4 represents a critical failure in access control mechanisms, specifically categorized under CWE-306: Missing Authentication for Critical Function. This flaw stems from the improper implementation of authentication checks on the storage API endpoint /storage/v1/object/{bucketId}/{path}. In a properly secured system, any request to retrieve or manipulate objects within private buckets must require valid credentials, such as an API key or JSON Web Token (JWT), to verify the requester's identity and permissions. However, in this vulnerable implementation, the server treats requests to this endpoint as public for all HTTP methods regardless of whether authentication headers are present or if they contain invalid tokens. This fundamental misconfiguration effectively bypasses the intended security boundary that separates private data from public access.
The operational impact of this vulnerability is severe due to its potential for both unauthorized data exfiltration and destructive actions against stored assets. An attacker who possesses knowledge of a specific tenant subdomain, along with the corresponding bucket ID and object path, can directly interact with the storage backend without any form of authentication. This capability allows for two primary malicious outcomes: downloading sensitive private objects or deleting them entirely. The ability to download data compromises confidentiality, potentially exposing proprietary information, user credentials, or other regulated data depending on what is stored in the buckets. Conversely, the ability to delete objects via HTTP methods such as DELETE impacts integrity and availability, allowing attackers to cause denial of service by removing critical files or corrupting application functionality that relies on specific assets being present.
From a threat modeling perspective, this vulnerability aligns with MITRE ATT&CK technique T1530: Data from Cloud Storage Object Infrastructure, which describes adversaries accessing data stored in cloud objects without proper authorization. The attack vector is straightforward and does not require complex exploitation techniques or social engineering; it relies solely on the attacker's ability to enumerate bucket IDs and object paths, a common risk when default configurations are used or when information leakage occurs through other vectors such as error messages or directory listings. Once these identifiers are known, the lack of authentication allows for immediate and unrestricted access to the targeted resources. This simplicity makes the vulnerability particularly dangerous in automated scanning scenarios where attackers can rapidly identify vulnerable instances across large networks.
Mitigation strategies must focus on enforcing strict authentication checks at the API gateway level before requests reach the application logic. Developers should ensure that all endpoints handling sensitive data, especially those involving file storage and manipulation, require valid authentication tokens or API keys for every HTTP method supported by the endpoint. It is also recommended to implement role-based access control (RBAC) to verify not just identity but also permission levels relative to specific buckets and objects. Additionally, implementing rate limiting and monitoring for unusual patterns of requests to storage endpoints can help detect potential exploitation attempts in real-time. Upgrading OtterMind Nubase to a version where this authentication bypass has been patched is the most direct remediation step, ensuring that the security model correctly distinguishes between public and private resources based on proper credential validation rather than defaulting to open access.