CVE-2026-30246: CWE-436: Interpretation Conflict in gofiber fiber
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.
AI Analysis
Technical Summary
The gofiber fiber web framework versions >= v3.0.0-beta.2 and < 3.1.0 have a cache middleware design flaw where the default cache key is generated solely from the request path, excluding the query string. This results in cache collisions for requests differing only by query parameters, causing incorrect cached responses to be served. This behavior can expose data from one request to another if the endpoint's response varies based on query parameters. The vulnerability is identified as CWE-436 (Interpretation Conflict). The issue is resolved in versions after 3.1.0.
Potential Impact
The vulnerability can cause information disclosure by serving cached responses intended for different query parameters, leading to potential data exposure between requests. The CVSS 3.1 base score is 6.5 (medium severity), indicating a network exploitable vulnerability with low complexity and no privileges or user interaction required, impacting confidentiality and integrity but not availability.
Mitigation Recommendations
Upgrade gofiber fiber to version 3.1.0 or later where the cache middleware key generation includes the query string, preventing cache key collisions. Since no official patch link or advisory is provided, verify the upgrade path through the vendor's official channels. Patch status is not explicitly confirmed beyond the statement that the issue is fixed after version 3.1.0.
CVE-2026-30246: CWE-436: Interpretation Conflict in gofiber fiber
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 v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The gofiber fiber web framework versions >= v3.0.0-beta.2 and < 3.1.0 have a cache middleware design flaw where the default cache key is generated solely from the request path, excluding the query string. This results in cache collisions for requests differing only by query parameters, causing incorrect cached responses to be served. This behavior can expose data from one request to another if the endpoint's response varies based on query parameters. The vulnerability is identified as CWE-436 (Interpretation Conflict). The issue is resolved in versions after 3.1.0.
Potential Impact
The vulnerability can cause information disclosure by serving cached responses intended for different query parameters, leading to potential data exposure between requests. The CVSS 3.1 base score is 6.5 (medium severity), indicating a network exploitable vulnerability with low complexity and no privileges or user interaction required, impacting confidentiality and integrity but not availability.
Mitigation Recommendations
Upgrade gofiber fiber to version 3.1.0 or later where the cache middleware key generation includes the query string, preventing cache key collisions. Since no official patch link or advisory is provided, verify the upgrade path through the vendor's official channels. Patch status is not explicitly confirmed beyond the statement that the issue is fixed after version 3.1.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-04T17:23:59.799Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f9e7ebcbff5d8610f9a671
Added to database: 5/5/2026, 12:51:55 PM
Last enriched: 5/5/2026, 1:06:36 PM
Last updated: 6/19/2026, 3:47:58 AM
Views: 87
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