CVE-2026-29779 PUBLISHED

UptimeFlare: Montior config / Credentials in `workerConfig` exposed in client-side JavaScript bundle

Assigner: GitHub_M
Reserved: 04.03.2026 Published: 07.03.2026 Updated: 07.03.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 7.5

Product Status

Vendor lyc8503
Product UptimeFlare
Versions
  • Version < 377a5963c66ba9a798abebfe8d80378b053435e9 is affected

References

Problem Types

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE