CVE-2026-110764 in AstronRPA
Summary
by MITRE • 10/14/2026
AstronRPA through 1.1.6 contains an insecure direct object reference vulnerability in the resource-service /file/download endpoint that allows authenticated users to download other tenants' files by supplying their fileId. Attackers can enumerate predictable time-ordered Snowflake file IDs, since FileMapper.getFile performs no owner or tenant check, to retrieve S3-stored files uploaded by other tenants.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability identified in AstronRPA versions up to 1.1.6 represents a critical failure in access control mechanisms within the resource-service component of the application architecture. Specifically, this flaw manifests as an Insecure Direct Object Reference (IDOR), categorized under CWE-639 in industry standard classification systems. The core technical issue resides in the /file/download endpoint, which is designed to serve files stored in Amazon S3 buckets. When a user requests a file download by providing a specific fileId parameter, the backend function FileMapper.getFile retrieves and serves the corresponding object without performing any validation checks regarding ownership or tenant isolation. This absence of authorization logic means that the system trusts the client-supplied identifier as sufficient proof of permission to access the resource, ignoring the fundamental security principle that access decisions must be based on verified user identity and role rather than just the existence of an object reference.
The operational impact of this vulnerability is severe for multi-tenant deployments where data isolation between different organizations or tenants is a primary requirement. Because the application does not verify whether the authenticated user requesting the file actually owns it, any valid user can potentially access files belonging to other tenants in the same instance. The risk is exacerbated by the predictability of the identifiers used. AstronRPA utilizes Snowflake-generated IDs for its files, which are typically time-ordered and sequential. This characteristic allows attackers to easily enumerate these fileId values through simple iteration or brute-force techniques. By systematically requesting downloads with incrementing file IDs, an attacker can discover valid references to sensitive documents stored by other tenants without needing prior knowledge of specific filenames or internal paths.
From a threat modeling perspective, this vulnerability aligns with the ATT&CK technique T1078, specifically relating to Valid Accounts and potentially T1530 for Data from Cloud Storage if the attacker successfully exfiltrates data from S3 via the application interface. The ability to download arbitrary files can lead to significant confidentiality breaches, including exposure of proprietary business information, personally identifiable information (PII), or other sensitive corporate documents belonging to competing tenants on the same platform. This undermines the trust model of Software-as-a-Service environments where customers expect strict data segregation and privacy guarantees from their service provider.
To mitigate this vulnerability, immediate remediation efforts should focus on implementing robust authorization checks within the FileMapper.getFile function or at a higher middleware layer before any file retrieval logic is executed. The system must verify that the authenticated user associated with the current session has explicit ownership rights over the requested fileId or belongs to the same tenant entity as the resource owner. Additionally, relying solely on sequential Snowflake IDs for access control is insufficient; while these identifiers are useful for database indexing and ordering, they should never be used as sole determinants of permission boundaries. Implementing random UUIDs that do not reveal creation order can also help reduce the efficiency of enumeration attacks, although this does not replace the need for strict server-side authorization checks. Regular security audits and penetration testing focusing on IDOR flaws are recommended to ensure ongoing compliance with secure coding standards such as OWASP API Security Top 10.