Vulnerability record · CVE-2026-29779 · published 7 March 2026

CVE-2026-29779: Lyc8503 uptimeflare information exposure vulnerability

Lyc8503 · Uptimeflare

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.

7.5 CVSS 3.1 High EPSS 0.47% · top 61.8% CWE-200 · Information exposure

7.5CVSS 3.1 base score

0.47%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Uptimeflare Lyc8503

References

Link	Tags
https://github.com/lyc8503/UptimeFlare/commit/377a5963c66ba9a798abebfe8d80378b053435e9	Patch
https://github.com/lyc8503/UptimeFlare/issues/198	Issue Tracking
https://github.com/lyc8503/UptimeFlare/security/advisories/GHSA-36q9-v7p3-vj6v	Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-29779), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.