CVE-2026-30246 MEDIUM

CVE-2026-30246: github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters

Vendor Gofiber
Product fiber
Weakness CWE-436
Published May 5, 2026
Last update May 5, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

Fiber is a web framework for Go. In github.com/gofiber/fiber/v3 versions through 3.1.0, the default key generator in the cache middleware uses only the request path and does not include the query string. As a result, requests for the same path with different query parameters can share a cache key and receive the wrong cached response. This can cause response mix-up for query-dependent endpoints and may expose data intended for a different request. This issue is fixed after version 3.1.0.

Key dates

02Disclosure timeline

May 5, 2026 CVE published
May 5, 2026 Record updated

Related vulnerabilities

04Related CVE