CVE-2026-32230

The GET /api/badge/:id/ping/:duration? endpoint in server/routers/api-router.js does not verify that the requested monitor belongs to a public group. All other badge endpoints check AND public = 1 in their SQL query before returning data. The ping endpoint skips this check entirely, allowing unauthenticated users to extract average ping/response time data for private monitors.

Affected Code

File: server/routers/api-router.js, approximately line 304

The ping badge endpoint directly calls UptimeCalculator.getUptimeCalculator(requestedMonitorId) without first checking if the monitor is public. Compare with the status badge endpoint (~line 148) which correctly queries:

SELECT monitor_group.monitor_id FROM monitor_group, `group`
WHERE monitor_group.group_id = `group`.id
AND monitor_group.monitor_id = ?
AND public = 1

Protected vs Vulnerable Endpoints

PoC

1. Install Uptime Kuma (tested on latest v2 stable via Docker)
2. Create an HTTP(s) monitor (e.g., monitoring http://localhost:3001)
3. Do NOT add the monitor to any public status page or group
4. Wait for heartbeats to accumulate (~5 minutes)
5. Query unauthenticated:

curl http://localhost:3001/api/badge/1/status   → returns N/A (correct, monitor is private)
curl http://localhost:3001/api/badge/1/ping/24  → returns "Avg. Ping (24h): 10ms" (LEAKED)

An unauthenticated attacker can:

• Enumerate private monitor IDs
• Extract average response time data for private monitors
• Infer existence and reachability of internal monitored services

The application does not perform an authorization check before performing a sensitive operation. Typical impact: unauthorized access to restricted functionality or data.

CVE-2026-32230 has a CVSS score of 5.3 (Medium). 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 (2.2.0); upgrading removes the vulnerable code path.

Kodem intelligence

Add the same public monitor check before the UptimeCalculator call:

let publicMonitor = await R.getRow(`
    SELECT monitor_group.monitor_id FROM monitor_group, \`group\`
    WHERE monitor_group.group_id = \`group\`.id
    AND monitor_group.monitor_id = ?
    AND public = 1
`, [requestedMonitorId]);

if (!publicMonitor) {
    badgeValues.message = "N/A";
    badgeValues.color = badgeConstants.naColor;
}

1. What is CVE-2026-32230? CVE-2026-32230 is a medium-severity missing authorization vulnerability in uptime-kuma (npm), affecting versions >= 2.0.0, <= 2.1.3. It is fixed in 2.2.0. The application does not perform an authorization check before performing a sensitive operation.
2. How severe is CVE-2026-32230? CVE-2026-32230 has a CVSS score of 5.3 (Medium). 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 uptime-kuma are affected by CVE-2026-32230? uptime-kuma (npm) versions >= 2.0.0, <= 2.1.3 is affected.
4. Is there a fix for CVE-2026-32230? Yes. CVE-2026-32230 is fixed in 2.2.0. Upgrade to this version or later.
5. Is CVE-2026-32230 exploitable, and should I be worried? Whether CVE-2026-32230 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-2026-32230 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-2026-32230? Upgrade uptime-kuma to 2.2.0 or later.