Supabase Capgo – Unauthenticated Cross-Tenant Build-Time Accounting Poisoning via record_build_time RPC_CVE-2026-56245

{
    "lastseen": "",
    "description": "Supabase Capgo before 12.128.2 contains an authorization bypass vulnerability in the SECURITY DEFINER record_build_time RPC function that allows unauthenticated attackers to insert arbitrary build-time records. Attackers can exploit this by calling POST /rest/v1/rpc/record_build_time with a public API key to poison billing and quota data for any organization, enabling resource exhaustion and cross-tenant billing manipulation.",
    "published": "2026-06-24T11:53:11.507Z",
    "modified": "2026-06-24T11:53:11.507Z",
    "type": "cve",
    "title": "Supabase Capgo - Unauthenticated Cross-Tenant Build-Time Accounting Poisoning via record_build_time RPC",
    "source": "VulnCheck",
    "references": "https://github.com/Cap-go/capgo/security/advisories/GHSA-42f8-v563-5763\nhttps://www.vulncheck.com/advisories/supabase-capgo-unauthenticated-cross-tenant-build-time-accounting-poisoning-via-record-build-time-rpc",
    "id": "CVE-2026-56245",
    "bulletinFamily": "",
    "cwe": [
        "CWE-269"
    ],
    "cvelist": null,
    "sourceData": "Cap-go capgo 0",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
        "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": "capgo",
    "version": "0",
    "vendor": "Cap-go",
    "ai_description": "Unauthenticated attackers can exploit an authorization bypass vulnerability in the SECURITY DEFINER record_build_time RPC function to insert arbitrary build-time records, enabling resource exhaustion and cross-tenant billing manipulation.",
    "ai_severity": "High",
    "ai_vendor": "Cap-go",
    "ai_product": "Capgo",
    "ai_version": "before 12.128.2",
    "ai_score": 8.8
}