free5GC: Improper Input Validation and Generation of Error Message Containing Sensitive Information in github.com/free5gc/udm_CVE-2026-42459

{
    "lastseen": "",
    "description": "free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the free5GC UDM component fails to validate the supi path parameter in six GET handlers of the nudm-sdm (Subscriber Data Management) service. An unauthenticated attacker can inject control characters into the SUPI parameter, causing UDM to forward a malformed request to UDR and return a 500 Internal Server Error response that exposes internal infrastructure details. This vulnerability is fixed in 4.2.2.",
    "published": "2026-05-27T15:53:45.452Z",
    "modified": "2026-05-27T15:53:45.452Z",
    "type": "cve",
    "title": "free5GC: Improper Input Validation and Generation of Error Message Containing Sensitive Information in github.com/free5gc/udm",
    "source": "GitHub_M",
    "references": "https://github.com/free5gc/free5gc/security/advisories/GHSA-585v-hcgf-jhfr",
    "id": "CVE-2026-42459",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20",
        "CWE-209"
    ],
    "cvelist": null,
    "sourceData": "free5gc free5gc < 4.2.2",
    "sourceHref": "",
    "cvss": {
        "score": 7.7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "free5gc",
    "version": "< 4.2.2",
    "vendor": "free5gc",
    "ai_description": "",
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    "ai_score": 0
}