{
    "id": "CVE-2015-9235",
    "published": "2018-05-29 20:29:00",
    "last_modified": "2026-06-17 00:36:06",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-20",
    "description": "In jsonwebtoken node module before 4.2.2 it is possible for an attacker to bypass verification when a token digitally signed with an asymmetric key (RS/ES family) of algorithms but instead the attacker send a token digitally signed with a symmetric algorithm (HS* family).",
    "epss_score": "0.08524",
    "epss_percentile": "0.94898",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-05 18:17:13",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "auth0",
            "product": "jsonwebtoken"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/",
        "https://github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b687",
        "https://nodesecurity.io/advisories/17",
        "https://www.timmclean.net/2015/02/25/jwt-alg-none.html",
        "https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/",
        "https://github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b687",
        "https://nodesecurity.io/advisories/17",
        "https://www.timmclean.net/2015/02/25/jwt-alg-none.html"
    ]
}