OpenPrinting CUPS: Local print admin token disclosure using temporary printers_CVE-2026-34990

{
    "lastseen": "",
    "description": "OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service with a reusable Authorization: Local ... token. That token is enough to drive /admin/ requests on localhost, and the attacker can combine CUPS-Create-Local-Printer with printer-is-shared=true to persist a file:///... queue even though the normal FileDevice policy rejects such URIs. Printing to that queue gives an arbitrary root file overwrite; the PoC below uses that primitive to drop a sudoers fragment and demonstrate root command execution. At time of publication, there are no publicly available patches.",
    "published": "2026-04-03T21:14:09.616Z",
    "modified": "2026-04-06T18:52:04.074Z",
    "type": "cve",
    "title": "OpenPrinting CUPS: Local print admin token disclosure using temporary printers",
    "source": "GitHub_M",
    "references": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-c54j-2vqw-wpwp",
    "id": "CVE-2026-34990",
    "bulletinFamily": "",
    "cwe": [
        "CWE-287"
    ],
    "cvelist": null,
    "sourceData": "OpenPrinting cups <= 2.4.16",
    "sourceHref": "",
    "cvss": {
        "score": 5,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:H/SI:H/SA:L",
        "version": "4.0"
    },
    "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": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "cups",
    "version": "<= 2.4.16",
    "vendor": "OpenPrinting",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}