Advisories for Golang/Github.com/Cloudreve/Cloudreve/V4 package

2026

Cloudreve is vulnerable to Account Takeover via Weak Cryptographic Token Generation (Insecure PRNG Seeding)

This vulnerability affects Cloudreve instances that were first deployed/initialized with versions prior to V4.10.0. The application uses the weak pseudo-random number generator math/rand seeded with time.Now().UnixNano() to generate critical security secrets, including the secret_key, and hash_id_salt. These secrets are generated upon first startup and persisted in the database. An attacker can exploit this by obtaining the administrator's account creation time (via public API endpoints) to narrow the search window for …