Golang
CVE-2025-66630
CRITICAL
GHSA-68rr-p4fp-j59v
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
AnalysisAI
Go Fiber web framework before 2.52.11 has a weak PRNG vulnerability (on Go < 1.24) that makes session tokens predictable, enabling session hijacking.
Technical ContextAI
Fiber < 2.52.11 uses a CWE-338 cryptographically weak PRNG for session token generation on Go versions prior to 1.24, making tokens predictable.
RemediationAI
Update Fiber to 2.52.11+ or use Go 1.24+.
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Vendor StatusVendor
SUSE
Severity: Critical| Product | Status |
|---|---|
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.5 | Fixed |
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External POC / Exploit Code
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