Description
Fiber is an Express-inspired web framework written in Go. Starting in version 2.52.6 and prior to version 2.52.7, `fiber.Ctx.BodyParser` can map flat data to nested slices using `key[idx]value` syntax, but when idx is negative, it causes a panic instead of returning an error stating it cannot process the data. Since this data is user-provided, this could lead to denial of service for anyone relying on this `fiber.Ctx.BodyParser` functionality. Version 2.52.7 fixes the issue.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| fiber | 2.0.0 | 2.52.7 |
| github.com/gofiber/fiber | — | — |
| github.com/gofiber/fiber/v2 | — | — |
References
Similar Threats
- Medium CVE-2026-42554
- Medium CVE-2026-30246
- High CVE-2026-25882
- High CVE-2026-25891
- High CVE-2026-25899
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