Description

An authenticated user without repository read permission may access package metadata under specific conditions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "4.3",
  "pubDate": "2026-08-12T16:17:21.440Z",
  "pubdate": "2026-08-12T16:17:21.440Z",
  "executiveSummary": "An authorization bypass vulnerability exists that permits an authenticated user lacking repository read permissions to access package metadata under specific conditions. This security flaw introduces risks related to unauthorized information disclosure within the affected ecosystem. The primary impact is the unauthorized exposure of sensitive package metadata to principals who should otherwise be restricted based on their assigned role-based access control configurations. The attacker capability is limited to information retrieval regarding packages rather than direct modification or code execution, provided they hold authenticated status within the platform. Exploitation requires the attacker to be authenticated and involves leveraging specific edge-case conditions that bypass standard permission validation checks governing repository read capabilities. The risk implication centers on the potential leakage of internal project structures, dependency trees, and package configurations to unauthorized users, which could facilitate subsequent targeted attacks or violate data privacy compliance requirements. Remediation requires tightening authorization enforcement mechanisms around package metadata endpoints to ensure that repository read permissions are strictly validated prior to serving any metadata responses.",
  "technicalDetails": "The vulnerability stems from a flaw in the access control logic governing package metadata endpoints within the application framework. Specifically, the authorization enforcement layer fails to properly evaluate repository read permissions under certain conditional execution paths when processing requests from authenticated users. The vulnerable component is the permission validation module responsible for arbitrating access to package-level information. \nUnder normal operating conditions, an authenticated user attempting to query package metadata must possess explicit read permissions for the target repository. However, due to the flaw, specific request parameters or state conditions allow the request lifecycle to bypass the standard middleware or function calls responsible for verifying these access rights. Consequently, the backend service processes the query and returns the requested package metadata payload to the unauthorized caller.\nThe step-by-step attack flow proceeds as follows: First, an attacker establishes an authenticated session within the platform, possessing valid user credentials but intentionally lacking read permissions for a specific target repository. Second, the attacker formulates a targeted HTTP request directed at the package metadata retrieval endpoint, potentially incorporating specific conditions or parameters designed to trigger the authorization bypass logic. Third, the application receives the request and improperly validates the session's privileges, incorrectly mapping the operation to an unconstrained or loosely verified code path. Fourth, the underlying database or storage layer retrieves the package metadata associated with the target repository. Fifth, the application serializes and returns the metadata payload in the response to the attacker. Post-exploitation impact is strictly bounded to unauthorized data disclosure, allowing the attacker to enumerate package details, versions, and internal configurations without holding the requisite repository read privileges."
}