CVE-2026-30246
This can cause response mix-up for query-dependent endpoints and may expose data intended for a different request.
Does this matter?
Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- EPSS
- 0.25% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-436
- Affected
- gofiber/fiber
- Source
- security-advisories@github.com
References
- https://github.com/gofiber/fiber/blob/main/middleware/cache/cache_test.go#L599-L621Product
- https://github.com/gofiber/fiber/blob/main/middleware/cache/config.go#L90-L92Product
- https://github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8Exploit, Vendor Advisory
- https://github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.