CVE-2026-29779: UptimeFlare is a serverless uptime monitoring & status page solution, powered by Cloudflare Workers

Q: How do I fix CVE-2026-29779?

uptimeflare: upgrade to 2026-03-04. Exact commands for each OS are on this page.

Q: Is CVE-2026-29779 being exploited?

CVE-2026-29779 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-29779 affect?

CVE-2026-29779 affects uptimeflare. Severity is high (CVSS 7.5). 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, c

Q: How urgent is CVE-2026-29779?

Priority 37/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2026-29779 is a high-severity flaw (CVSS 7.5) affecting uptimeflare. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-si

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-200
Published	2026-03-07
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: lyc8503

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-07 16:15 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

lyc8503 uptimeflare UPGRADE

Affected: < 2026-03-04

Fixed in: 2026-03-04

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy uptimeflare || rpm -q uptimeflare || uptimeflare --version

2. UPGRADE to 2026-03-04 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade uptimeflare

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade uptimeflare

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-29779?

uptimeflare: upgrade to 2026-03-04. Exact commands for each OS are on this page.

Is CVE-2026-29779 being exploited?

CVE-2026-29779 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-29779 affect?

CVE-2026-29779 affects uptimeflare. Severity is high (CVSS 7.5). 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, c

How urgent is CVE-2026-29779?

Priority 37/100. High severity; Remotely exploitable, no login, no user action

Software pages

Cloudflare vulnerabilities

References

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