Description
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.
Affected products
gofiber: fiber
References4
- github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8 ExploitVendor Advisory
- github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8 ExploitVendor Advisory
- github.com/gofiber/fiber/blob/main/middleware/cache/cache_test.… Product
- github.com/gofiber/fiber/blob/main/middleware/cache/config.go#L… Product
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 17 · as of 13 November 2026
- CWE
- CWE-436
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.