Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route registration combined with an unbounded array write during request matching.
Version 2.52.12 patches the issue in the v2 branch and 3.1.0 patches the issue in the v3 branch.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/gofiber/fiber/blob/main/path.go#L514
security-advisories@github.com
https://github.com/gofiber/fiber/blob/v2/path.go#L516
security-advisories@github.com
https://github.com/gofiber/fiber/pull/3962
security-advisories@github.com
https://github.com/gofiber/fiber/security/advisories/GHSA-mrq8-rjmw-wpq3
security-advisories@github.com