CVE-2026-85184

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-85184

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85184.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-85184

Aliases

GHSA-hx87-8wv7-pjv8

Published

2026-09-04T09:15:51Z

Modified

2026-09-10T03:30:56Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator

Summary

@fastify/middie vulnerable to path-scoped middleware bypass via absolute-form request target

Details

@fastify/middie versions >= 9.1.0 and before 9.3.4 decide whether to run path-scoped middleware by matching against the raw request target, while the Fastify router resolves an absolute-form request target to its path before dispatching. Because the two layers evaluate different strings, a request using an absolute-form target reaches the route handler while the path-scoped middleware, such as authentication or authorization, is skipped. An unauthenticated network attacker can use this to bypass path-based access controls in a Fastify application that relies on middie for those controls. Users should upgrade to @fastify/middie 9.3.4 or later.

Database specific

{
    "cna_assigner": "openjs",
    "cwe_ids": [
        "CWE-436"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85184.json"
}

References

Affected packages

Git / github.com/fastify/middie

Affected ranges

Type

GIT

Repo

https://github.com/fastify/middie

Events

Introduced

8de54e35035cefa5ca13fd9f06c7b38185038a0e

Fixed

310c7ef480bf1db2508316db7a42fdf274e6802e

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "9.1.0"
        },
        {
            "fixed": "9.3.4"
        },
        {
            "introduced": "0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v9.*

v9.1.0

v9.2.0

v9.3.0

v9.3.1

v9.3.2

v9.3.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85184.json"