CVE-2026-29779UptimeFlare: Montior config / Credentials in `workerConfig` exposed in client-side JavaScript bundle
Updated under an hour ago ()
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It affects lyc8503 UptimeFlare. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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UptimeFlare is a serverless uptime monitoring & status page solution, powered by Cloudflare Workers. Prior to commit 377a596, configuration file uptime.config.ts exports both pageConfig (safe for client use) and workerConfig (server-only, contains sensitive data) from the same module. Due to pages/incidents.tsx importing and using workerConfig directly inside client-side component code, the entire workerConfig object was included in the client-side JavaScript bundle served to all visitors. This issue has been patched via commit 377a596.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
lyc8503 UptimeFlare lyc8503:uptimeflare (from the name) | before 377a5963c66ba9a798abebfe8d80378b053435e9 | CNA record |
lyc8503 uptimeflare lyc8503:uptimeflare | before 2026-03-04 | NVD |
References
- https://github.com/lyc8503/UptimeFlare/security/advisories/GHSA-36q9-v7p3-vj6vx-refsource-confirm, vendor-advisory
- https://github.com/lyc8503/UptimeFlare/issues/198x-refsource-misc, issue-tracking
- https://github.com/lyc8503/UptimeFlare/commit/377a5963c66ba9a798abebfe8d80378b053435e9x-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.