emp3r0r Agent-Controlled Metadata to Operator RCE (tmux Command Injection)_CVE-2026-26068

{
    "lastseen": "",
    "description": "emp3r0r is a stealth-focused C2 designed by Linux users for Linux environments. Prior to 3.21.1, untrusted agent metadata (Transport, Hostname) is accepted during check-in and later interpolated into tmux shell command strings executed via /bin/sh -c. This enables command injection and remote code execution on the operator host. This vulnerability is fixed in 3.21.1.",
    "published": "2026-02-12T22:01:23.212Z",
    "modified": "2026-02-12T22:01:23.212Z",
    "type": "cve",
    "title": "emp3r0r Agent-Controlled Metadata to Operator RCE (tmux Command Injection)",
    "source": "GitHub_M",
    "references": "https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp\nhttps://github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0\nhttps://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1",
    "id": "CVE-2026-26068",
    "bulletinFamily": "",
    "cwe": [
        "CWE-77",
        "CWE-78"
    ],
    "cvelist": null,
    "sourceData": "jm33-m0 emp3r0r < 3.21.1",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
        "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": "emp3r0r",
    "version": "< 3.21.1",
    "vendor": "jm33-m0",
    "ai_description": "Command injection and remote code execution vulnerability in emp3r0r due to untrusted agent metadata interpolation into tmux shell command strings",
    "ai_severity": "Critical",
    "ai_vendor": "jm33-m0",
    "ai_product": "emp3r0r",
    "ai_version": "< 3.21.1",
    "ai_score": 9.3
}