Budibase: Anonymous NoSQL operator injection via published-app query templates_CVE-2026-54350

{
    "lastseen": "",
    "description": "Budibase is an open-source low-code platform. Prior to 3.39.12,  an unauthenticated visitor of any published Budibase app reads every document of the backing MongoDB, CouchDB, Elasticsearch, DynamoDB-PartiQL, or REST-with-JSON-body collection and, where the builder has published a PUBLIC write query, modifies every document of that collection with one HTTP request. enrichContext at packages/server/src/sdk/workspace/queries/queries.ts:121-138 substitutes parameter values into the raw JSON body of a query, then JSON.parses the result. The validator validateQueryInputs at packages/server/src/api/controllers/query/index.ts:61-71 rejects only Handlebars markers ({{, }}) in user input and does not escape JSON metacharacters (\", \\, }). A parameter value containing a closing quote and additional keys lifts attacker-controlled fields into the parsed filter object. For Mongo find, the parsed filter passes directly to collection.find() (packages/server/src/integrations/mongodb.ts:506-510). Duplicate-key JSON parsing overrides the builder's {name: \"...\"} with {name: {$exists: true}} and returns every document. The same primitive against an updateMany query (mongodb.ts:577-585) widens the filter scope to the full collection while the builder-controlled $set body runs against every matched document. The authorized middleware at packages/server/src/middleware/authorized.ts:141-148 short-circuits when the query's role is PUBLIC. CSRF is not enforced on this path. POST /api/v2/queries/:queryId (packages/server/src/api/routes/query.ts:63) accepts the call with no session, only an x-budibase-app-id header that is public from the published-app URL. This vulnerability is fixed in 3.39.12.",
    "published": "2026-06-26T20:44:00.337Z",
    "modified": "2026-06-26T20:44:00.337Z",
    "type": "cve",
    "title": "Budibase: Anonymous NoSQL operator injection via published-app query templates",
    "source": "GitHub_M",
    "references": "https://github.com/Budibase/budibase/security/advisories/GHSA-8qv3-p479-cj62",
    "id": "CVE-2026-54350",
    "bulletinFamily": "",
    "cwe": [
        "CWE-89",
        "CWE-943"
    ],
    "cvelist": null,
    "sourceData": "Budibase budibase < 3.39.12",
    "sourceHref": "",
    "cvss": {
        "score": 10,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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    "href": "",
    "category_name": "CVE",
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    "product": "budibase",
    "version": "< 3.39.12",
    "vendor": "Budibase",
    "ai_description": "Unauthenticated NoSQL operator injection via published-app query templates, allowing unauthorized access and modification of documents in the backing database",
    "ai_severity": "Critical",
    "ai_vendor": "Budibase",
    "ai_product": "Budibase",
    "ai_version": "< 3.39.12",
    "ai_score": 10
}