CVE Details
Basic Information
| Title | Fiber Susceptible to Crash via `BodyParser` Due to Unvalidated Large Slice Index in Decoder |
|---|---|
| Type | cve |
| Published | 2025-08-05T23:33:28.221Z |
| Modified | 2025-08-05T23:33:28.221Z |
Product Information
| Vendor | gofiber |
|---|---|
| Product | fiber |
| Version | < 2.52.9 |
CVSS Information
| Base Score | 8.7 (HIGH) |
|---|---|
| Attack Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
Affected Products
- gofiber fiber < 2.52.9
Additional Information
| CWE List | CWE-789 |
|---|---|
| Source | GitHub_M |
Description
Fiber is an Express inspired web framework written in Go. In versions 2.52.8 and below, when using Fiber’s Ctx.BodyParser to parse form data containing a large numeric key that represents a slice index (e.g., test.18446744073704), the application crashes due to an out-of-bounds slice allocation in the underlying schema decoder. The root cause is that the decoder attempts to allocate a slice of length idx + 1 without validating whether the index is within a safe or reasonable range. If the idx is excessively large, this leads to an integer overflow or memory exhaustion, causing a panic or crash. This is fixed in version 2.52.9.