CVE-2026-76032: Pydio Cells 5.0.0 to 5.0.2 - Missing Authorization on the Share Link REST Handler
Pydio Cells 5.0.0 through 5.0.2 returns share-link details to any authenticated user. The REST handler for GET /a/share/link/{Uuid} in idm/share/rest/handler.go reads the workspace UUID from the path, calls LinkById, and writes the result with no authorization step, whereas the sibling handler for GET /a/share/cell/{Uuid} loads the workspace and requires MatchPolicies with ResourcePolicyActionREAD, returning a not-found error so that existence is not disclosed. Nothing compensates further down: GetLinkWorkspace reaches GetOrCreateWorkspace, which issues SearchWorkspace with a query carrying no ResourcePolicyQuery, and PrepareResourcePolicyQuery returns the query unmodified when that field is nil, so the workspace service applies no policy filter. The workspace UUID is not secret, because the unauthenticated public page served for a share link embeds it as STARTREPOSITORY. Any account holding a standard user role can therefore submit the UUID and receive the link hash and URL, the owner's user identifier, the hidden share user login, the permission set, the download limit and count, the target users, the expiry, and the password-required flag, while a direct read of the shared node from the same account is refused.
Affected Software
Event History
Frequently Asked Questions
Who can access the exposed share-link information?
Any authenticated account with a standard user role can query the affected endpoint for a share link when it knows the workspace UUID. The UUID is exposed in the unauthenticated public share page as START_REPOSITORY, so it should not be treated as a secret.
What does an attacker need to exploit this issue?
An attacker needs an authenticated Pydio Cells account and the workspace UUID associated with a share link. No elevated privileges or user interaction are required.
What information can be disclosed?
The affected handler returns the link hash and URL, owner identifier, hidden share-user login, permissions, download limit and count, target users, expiry information, and whether a password is required. The described issue is information disclosure; the provided data does not indicate that it permits direct reading of shared node content.
Which versions are affected and is a remediation identified?
Pydio Cells versions 5.0.0 through 5.0.2 are identified as affected. The provided data does not specify a fixed version or a workaround.