CVE-2026-29779

HIGH EPSS 20.3%
Published Mar 7, 20264mo ago · Modified Mar 11, 20263mo ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 7, 2026 4mo ago
Last Modified Mar 11, 2026 3mo ago

Description

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
20.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

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

Affected Products 1

VendorProductVersionRange
lyc8503uptimeflare* <2026-03-04

References 3

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

Remediation

  • github.com https://github.com/lyc8503/UptimeFlare/commit/377a5963c66ba9a798abebfe8d80378b053435e9
    Patch