CVE-2026-30246
github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-436 |
| Vendor | gofiber |
| Product | fiber |
| Published | May 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
gofiber / fiber
>= v3.0.0-beta.2, < 3.1.0