github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters_CVE-2026-30246

{
    "lastseen": "",
    "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.",
    "published": "2026-05-05T12:40:19.813Z",
    "modified": "2026-05-05T12:40:19.813Z",
    "type": "cve",
    "title": "github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters",
    "source": "GitHub_M",
    "references": "https://github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8\nhttps://github.com/gofiber/fiber/blob/main/middleware/cache/cache_test.go#L599-L621\nhttps://github.com/gofiber/fiber/blob/main/middleware/cache/config.go#L90-L92",
    "id": "CVE-2026-30246",
    "bulletinFamily": "",
    "cwe": [
        "CWE-436"
    ],
    "cvelist": null,
    "sourceData": "gofiber fiber >= v3.0.0-beta.2, < 3.1.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "fiber",
    "version": ">= v3.0.0-beta.2, < 3.1.0",
    "vendor": "gofiber",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}