IDOR: View Circle Memberships via Guessed 15char ID
CVE-2026-68493 Published on September 18, 2026
After guessing a 62^15 complex unique identifier, a malicious logged in user was able to retrieve a list of memberships for a circle they are not a member of.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-68493 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-68493
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Affected Versions
Nextcloud Server:- Version 32.0.0, <= 34.0.0 is affected.