CVE-2025-48075: Fiber Package Panic Due to Invalid Range Index in BodyParser
Summary
CVE-2025-48075: Fiber panics when fiber.Ctx.BodyParser parses invalid range index in github.com/gofiber/fiber. Affected versions are not published. No fix is published. How to fix ↓
Also tracked for
The same CVE-2025-48075 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
The Fiber package is a popular web framework for Go, designed to provide an easy and fast way to build web applications. It is known for its performance and simplicity, making it a preferred choice among developers. However, like any software, it can have vulnerabilities that may affect its stability and security. This particular vulnerability arises from the BodyParser function, which is responsible for parsing incoming request bodies. When an invalid range index is encountered, it can lead to a panic, causing the application to crash.
Vulnerability Detail
The vulnerability occurs in the Fiber package when the fiber.Ctx.BodyParser attempts to parse an invalid range index. This can lead to a panic in the application, resulting in unexpected behavior or crashes. The issue originates from improper handling of input data, which can be exploited if an attacker sends malformed requests. The ramifications of this vulnerability can be severe, as it may allow attackers to disrupt service or exploit other weaknesses in the application.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, you can implement input validation before passing data to the BodyParser. Ensure that the incoming request body conforms to expected formats and ranges. This can help prevent invalid data from causing a panic. Example code for validation could look like this:
if err := validateRequestBody(requestBody); err != nil {
// Handle invalid request
return
}
Conclusion
In summary, CVE-2025-48075 is a critical vulnerability in the Fiber package that can lead to application crashes due to improper handling of input data. It is essential to update to the latest patched version to ensure the stability and security of your applications. Additionally, implementing input validation can serve as a temporary workaround until the update is applied.
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FAQ
CVE-2025-48075 is a vulnerability in the Fiber web framework for Go, where the BodyParser function can panic when parsing an invalid range index.
This vulnerability can cause your application to crash if it encounters malformed requests, leading to service disruptions.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Update your Fiber package to version 2.52.7 or later to patch the vulnerability and prevent potential crashes.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just the Gopkg.lock file.
References
Related vulnerabilities
Recent vulnerabilities recorded for github.com/gofiber/fiber.
