CloudNativePG: Metrics exporter allows privilege escalation to PostgreSQL superuser and OS RCE_CVE-2026-44477

{
    "lastseen": "",
    "description": "CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments. Prior to 1.29.1 and 1.28.3, the CloudNativePG metrics exporter opens its PostgreSQL connection as the postgres superuser via the pod-local Unix socket, then demotes the session with SET ROLE pg_monitor. SET ROLE changes only current_user; session_user remains postgres. Any SQL expression evaluated inside the scrape session can invoke RESET ROLE to recover real superuser privileges, then use COPY ... TO PROGRAM to spawn an OS-level subprocess as the postgres user inside the primary pod. The READ ONLY transaction flag does not block this; it gates writes to database state, not external processes. This vulnerability is fixed in 1.29.1 and 1.28.3.",
    "published": "2026-05-28T15:46:12.241Z",
    "modified": "2026-05-28T15:46:12.241Z",
    "type": "cve",
    "title": "CloudNativePG: Metrics exporter allows privilege escalation to PostgreSQL superuser and OS RCE",
    "source": "GitHub_M",
    "references": "https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39\nhttps://github.com/cloudnative-pg/cloudnative-pg/pull/10576",
    "id": "CVE-2026-44477",
    "bulletinFamily": "",
    "cwe": [
        "CWE-250",
        "CWE-271",
        "CWE-426"
    ],
    "cvelist": null,
    "sourceData": "cloudnative-pg cloudnative-pg < 1.28.3\ncloudnative-pg cloudnative-pg >= 1.29.0, < 1.29.1",
    "sourceHref": "",
    "cvss": {
        "score": 9.4,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/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": "",
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "cloudnative-pg",
    "version": "< 1.28.3",
    "vendor": "cloudnative-pg",
    "ai_description": "Privilege escalation to PostgreSQL superuser and OS RCE via metrics exporter",
    "ai_severity": "Critical",
    "ai_vendor": "CloudNativePG",
    "ai_product": "CloudNativePG",
    "ai_version": "< 1.28.3, >= 1.29.0, < 1.29.1",
    "ai_score": 9.4
}