CVE-2026-30246
github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters
MEDIUM 6.5EPSS 0.4%
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
- gofiber · fiber
- CVSS v3.1 GITHUB
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS
- 0.37% chance of exploitation in the next 30 days, 30th percentile
- Published
- 2026-05-05
Proof-of-concept exploits (1)
Security advisories
- gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8
- gofiber/fiber/blob/main/middleware/cache/config.go#L90-L92