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CVE-2025-48075— Fiber panics when fiber.Ctx.BodyParser parses invalid range index

Quick assessment

Affected
gofiber fiber
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fiber是Fiber开源的一款使用Go语言编写的开源Web框架。 Fiber 2.52.6至2.52.7之前版本存在输入验证错误漏洞，该漏洞源于fiber.Ctx.BodyParser处理负索引时崩溃，可能导致拒绝服务。

AI Predicted 7.5 Difficulty: Trivial EPSS 0.50% · P41

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-48075

Vulnerability Information
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Vulnerability Title
Fiber panics when fiber.Ctx.BodyParser parses invalid range index
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Fiber 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fiber是Fiber开源的一款使用Go语言编写的开源Web框架。 Fiber 2.52.6至2.52.7之前版本存在输入验证错误漏洞，该漏洞源于fiber.Ctx.BodyParser处理负索引时崩溃，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gofiber fiber >= 2.52.6, < 2.52.7 -

II. Public POCs for CVE-2025-48075

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III. Intelligence Information for CVE-2025-48075

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Vendor Advisories for CVE-2025-48075 (1)

IV. Related Vulnerabilities

Same product: fiber
Same vendor: gofiber
Same weakness: CWE-129

V. Comments for CVE-2025-48075

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