Description
Fiber is an Express inspired web framework written in Go. Before 2.52.11, on Go versions prior to 1.24, the underlying crypto/rand implementation can return an error if secure randomness cannot be obtained. Because no error is returned by the Fiber v2 UUID functions, application code may unknowingly rely on predictable, repeated, or low-entropy identifiers in security-critical pathways. This is especially impactful because many Fiber v2 middleware components (session middleware, CSRF, rate limiting, request-ID generation, etc.) default to using utils.UUIDv4(). This vulnerability is fixed in 2.52.11.
Problem types
CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Product status
References
github.com/.../fiber/security/advisories/GHSA-68rr-p4fp-j59v
github.com/...ommit/eb874b6f6c5896b968d9b0ab2b56ac7052cb0ee1
github.com/gofiber/fiber/releases/tag/v2.52.11