CVE-2026-9495

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Source
https://cve.org/CVERecord?id=CVE-2026-9495
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9495.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-9495
Aliases
Published
2026-05-26T05:00:04.704Z
Modified
2026-07-08T08:11:42.163057966Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
[none]
Details

Versions of the package @koa/router from 14.0.0 and before 15.0.0 are vulnerable to Access Control Bypass due to the middleware being silently dropped from the execution chain when the router prefix contains path parameters. Depending on what the skipped middleware was supposed to protect, an attacker could bypass authentication and authorization, evade rate limiting or bypass input sanitization.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9495.json",
    "cna_assigner": "snyk",
    "cwe_ids": [
        "CWE-284"
    ]
}
References

Affected packages

Git / github.com/koajs/router

Affected ranges

Type
GIT
Repo
https://github.com/koajs/router
Events
Introduced
bc67eef59aa02d988becc048b8f99dbdaaa2580c
Fixed
b65d6aee875cc0065082d4a95cc54856cc57c37e
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "14.0.0"
        },
        {
            "fixed": "15.0.0"
        }
    ]
}

Affected versions

v14.*
v14.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9495.json"