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7.5
HIGH CVSS 3.1
CVE-2026-29779
UptimeFlare: Montior config / Credentials in `workerConfig` exposed in client-side JavaScript bundle
Overview
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.

Details
INFO

Published Date :

March 7, 2026, 4:15 p.m.

Last Modified :

March 11, 2026, 10:07 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-29779 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Lyc8503 uptimeflare
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
CVSS 3.1 HIGH MITRE-CVE
Solution
Remove sensitive configuration data from client-side bundles.
  • Ensure server-only configurations are not imported client-side.
  • Separate sensitive data into a distinct configuration.
  • Review all client-side code for sensitive data exposure.
  • Update to a version that includes commit 377a596.
Public PoC/Exploit Available at Github

CVE-2026-29779 has a 19 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-29779.

URL Resource
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
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-29779 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-29779 weaknesses.

CAPEC-13: Subverting Environment Variable Values Subverting Environment Variable Values CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-59: Session Credential Falsification through Prediction Session Credential Falsification through Prediction CAPEC-60: Reusing Session IDs (aka Session Replay) Reusing Session IDs (aka Session Replay) CAPEC-79: Using Slashes in Alternate Encoding Using Slashes in Alternate Encoding CAPEC-116: Excavation Excavation CAPEC-169: Footprinting Footprinting CAPEC-224: Fingerprinting Fingerprinting CAPEC-285: ICMP Echo Request Ping ICMP Echo Request Ping CAPEC-287: TCP SYN Scan TCP SYN Scan CAPEC-290: Enumerate Mail Exchange (MX) Records Enumerate Mail Exchange (MX) Records CAPEC-291: DNS Zone Transfers DNS Zone Transfers CAPEC-292: Host Discovery Host Discovery CAPEC-293: Traceroute Route Enumeration Traceroute Route Enumeration CAPEC-294: ICMP Address Mask Request ICMP Address Mask Request CAPEC-295: Timestamp Request Timestamp Request CAPEC-296: ICMP Information Request ICMP Information Request CAPEC-297: TCP ACK Ping TCP ACK Ping CAPEC-298: UDP Ping UDP Ping CAPEC-299: TCP SYN Ping TCP SYN Ping CAPEC-300: Port Scanning Port Scanning CAPEC-301: TCP Connect Scan TCP Connect Scan CAPEC-302: TCP FIN Scan TCP FIN Scan CAPEC-303: TCP Xmas Scan TCP Xmas Scan CAPEC-304: TCP Null Scan TCP Null Scan CAPEC-305: TCP ACK Scan TCP ACK Scan CAPEC-306: TCP Window Scan TCP Window Scan CAPEC-307: TCP RPC Scan TCP RPC Scan CAPEC-308: UDP Scan UDP Scan CAPEC-309: Network Topology Mapping Network Topology Mapping CAPEC-310: Scanning for Vulnerable Software Scanning for Vulnerable Software CAPEC-312: Active OS Fingerprinting Active OS Fingerprinting CAPEC-313: Passive OS Fingerprinting Passive OS Fingerprinting CAPEC-317: IP ID Sequencing Probe IP ID Sequencing Probe CAPEC-318: IP 'ID' Echoed Byte-Order Probe IP 'ID' Echoed Byte-Order Probe CAPEC-319: IP (DF) 'Don't Fragment Bit' Echoing Probe IP (DF) 'Don't Fragment Bit' Echoing Probe CAPEC-320: TCP Timestamp Probe TCP Timestamp Probe CAPEC-321: TCP Sequence Number Probe TCP Sequence Number Probe CAPEC-322: TCP (ISN) Greatest Common Divisor Probe TCP (ISN) Greatest Common Divisor Probe CAPEC-323: TCP (ISN) Counter Rate Probe TCP (ISN) Counter Rate Probe CAPEC-324: TCP (ISN) Sequence Predictability Probe TCP (ISN) Sequence Predictability Probe CAPEC-325: TCP Congestion Control Flag (ECN) Probe TCP Congestion Control Flag (ECN) Probe CAPEC-326: TCP Initial Window Size Probe TCP Initial Window Size Probe CAPEC-327: TCP Options Probe TCP Options Probe CAPEC-328: TCP 'RST' Flag Checksum Probe TCP 'RST' Flag Checksum Probe CAPEC-329: ICMP Error Message Quoting Probe ICMP Error Message Quoting Probe CAPEC-330: ICMP Error Message Echoing Integrity Probe ICMP Error Message Echoing Integrity Probe CAPEC-472: Browser Fingerprinting Browser Fingerprinting CAPEC-497: File Discovery File Discovery CAPEC-508: Shoulder Surfing Shoulder Surfing CAPEC-573: Process Footprinting Process Footprinting CAPEC-574: Services Footprinting Services Footprinting CAPEC-575: Account Footprinting Account Footprinting CAPEC-576: Group Permission Footprinting Group Permission Footprinting CAPEC-577: Owner Footprinting Owner Footprinting CAPEC-616: Establish Rogue Location Establish Rogue Location CAPEC-643: Identify Shared Files/Directories on System Identify Shared Files/Directories on System CAPEC-646: Peripheral Footprinting Peripheral Footprinting CAPEC-651: Eavesdropping Eavesdropping

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
legspcpd846/uptime-lc

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 2 days, 18 hours ago
0 stars 0 fork 0 watcher
Born at : April 2, 2026, 6:52 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
744904607/UptimeFlare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 1 week ago
0 stars 0 fork 0 watcher
Born at : March 28, 2026, 10:26 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
ExcelsiorRC/uptimeflare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 1 week, 2 days ago
0 stars 0 fork 0 watcher
Born at : March 27, 2026, 4:30 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
timvoaus/uptimechecknextdns

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 1 week, 4 days ago
0 stars 0 fork 0 watcher
Born at : March 25, 2026, 6:21 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
tommodore/smoothtime-status

Status Page for smoothtime.io ntp servers

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 1 week, 6 days ago
0 stars 0 fork 0 watcher
Born at : March 22, 2026, 2:23 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
malphitee/UptimeFlare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 2 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : March 20, 2026, 5:47 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
kiln-troops0s/UptimeFlare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 2 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : March 20, 2026, 2:41 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
szxzip/status.szxzip.net

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 2 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : March 16, 2026, 9:19 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
bakebakebakebake/fxj-status

Status page for fxj.wiki

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 3 weeks, 6 days ago
0 stars 0 fork 0 watcher
Born at : March 9, 2026, 11:26 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
T7777520/UptimeFlare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 4 weeks ago
0 stars 0 fork 0 watcher
Born at : March 8, 2026, 4:27 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
anoraktrend/UptimeFlare

None

Dockerfile TypeScript Python Shell JavaScript CSS

Updated: 3 weeks, 5 days ago
0 stars 0 fork 0 watcher
Born at : March 7, 2026, 10:55 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
shihwebog/uptimeflare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 3 weeks, 1 day ago
0 stars 0 fork 0 watcher
Born at : March 7, 2026, 8:52 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
lostlight-commits/uptimeflare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 4 weeks, 1 day ago
0 stars 0 fork 0 watcher
Born at : March 6, 2026, 7:19 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
miyugo/UptimeFlare

None

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : March 5, 2026, 3:24 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
defendsvip/UptimeFlare

网站探针监控程序

Dockerfile TypeScript HCL Python Shell JavaScript CSS

Updated: 3 weeks, 5 days ago
0 stars 0 fork 0 watcher
Born at : Feb. 25, 2026, 1:36 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-29779 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-29779 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Mar. 11, 2026

    Action Type Old Value New Value
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:lyc8503:uptimeflare:*:*:*:*:*:*:*:* versions up to (excluding) 2026-03-04
    Added Reference Type GitHub, Inc.: https://github.com/lyc8503/UptimeFlare/commit/377a5963c66ba9a798abebfe8d80378b053435e9 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/lyc8503/UptimeFlare/issues/198 Types: Issue Tracking
    Added Reference Type GitHub, Inc.: https://github.com/lyc8503/UptimeFlare/security/advisories/GHSA-36q9-v7p3-vj6v Types: Vendor Advisory
  • New CVE Received by [email protected]

    Mar. 07, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Added CWE CWE-200
    Added Reference https://github.com/lyc8503/UptimeFlare/commit/377a5963c66ba9a798abebfe8d80378b053435e9
    Added Reference https://github.com/lyc8503/UptimeFlare/issues/198
    Added Reference https://github.com/lyc8503/UptimeFlare/security/advisories/GHSA-36q9-v7p3-vj6v
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact