CVE-2026-30246

Summary

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 Software

Weaknesses

• CWE-436: CWE-436: Interpretation Conflict

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8

References

• https://github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8
• https://github.com/gofiber/fiber/blob/main/middleware/cache/cache_test.go#L599-L621
• https://github.com/gofiber/fiber/blob/main/middleware/cache/config.go#L90-L92

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