CVE-2025-48075

HIGH

Fiber 2.52.6 - Denial of Service via Negative Array Index in BodyParser

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0044
EPSS Percentile 34.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-129
Status published
Products (2)
gofiber/fiber 2.0.0 - 2.52.7
gofiber/fiber 2.52.6 - 2.52.7Go
Published May 22, 2025
Tracked Since Feb 18, 2026