CVE-2026-30246CWE-436

github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters

Medium · published May 5, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
30.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00372 · 30.0th percentile
Weakness
CWE-436 · Interpretation Conflict
Published
2026-05-05T12:40Z
EPSS history
Timeline
  • 05 MAY 12:40Z
    github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters
    cvelistv5