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

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Summary

CVECVE-2026-30246
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-05 13:16:28 UTC
Updated2026-05-07 15:52:00 UTC
DescriptionFiber 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.000360000 probability, percentile 0.106610000 (date 2026-05-11)

Problem Types: CWE-436 | CWE-436 CWE-436: Interpretation Conflict

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gofiber Fiber affected >= v3.0.0-beta.2, < 3.1.0 Not specified

References

ReferenceSourceLinkTags
github.com/gofiber/fiber/blob/main/middleware/cache/config.go [email protected] github.com
github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/gofiber/fiber/blob/main/middleware/cache/cache_test.go [email protected] github.com
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