CVE-2026-30829: Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response

Q: How do I fix CVE-2026-30829?

checkmate: upgrade to 3.4.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-30829 being exploited?

CVE-2026-30829 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-2026-30829 affect?

CVE-2026-30829 affects checkmate. Severity is medium (CVSS 5.3). Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. Prior to version 3.4.0, an unauthenticated information disclosure

Q: How urgent is CVE-2026-30829?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-30829 is a medium-severity flaw (CVSS 5.3) affecting checkmate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. Prior to version 3.4.0, an unauthenticated information disclosure vulnerability exists in the GET /api/v1/status-page/:url endpoint. The endpoint does not enforce authentication or verify whether a status page is published before returning full status page details. As a resu

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-200
Published	2026-03-07
Last modified	2026-06-17

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

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 06:16 UTCPublished CVE record published
2026-06-17 10:32 UTCUpdated Record last modified

bluewavelabs checkmate UPGRADE

Affected: < 3.4.0

Fixed in: 3.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.4.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade checkmate

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-2026-30829?

checkmate: upgrade to 3.4.0. Exact commands for each OS are on this page.

Is CVE-2026-30829 being exploited?

CVE-2026-30829 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-2026-30829 affect?

CVE-2026-30829 affects checkmate. Severity is medium (CVSS 5.3). Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. Prior to version 3.4.0, an unauthenticated information disclosure

How urgent is CVE-2026-30829?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-31836 HIGH 8.1 UPGRADE Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response

References

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