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Checkmate CVE-2026-30829

MEDIUM
Information Exposure (CWE-200)
2026-03-07 security-advisories@github.com
Information Disclosure Checkmate
5.3
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Mar 11, 2026 - 18:56 vuln.today
Public exploit code
CVE Published
Mar 07, 2026 - 06:16 nvd
MEDIUM 5.3

DescriptionGitHub Advisory

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 As a result, unpublished status pages and their associated internal data are accessible to any unauthenticated user via direct API requests. This issue has been patched in version 3.4.0.

AnalysisAI

Checkmate versions prior to 3.4.0 allow unauthenticated attackers to retrieve unpublished status pages and internal monitoring data through the GET /api/v1/status-page/:url endpoint due to missing authentication checks. Public exploit code exists for this information disclosure vulnerability, enabling remote attackers to access sensitive server hardware, uptime, and incident details without credentials. …

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Vulnerability AssessmentAI

Risk Assessment CVSS 5.3 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker without authentication could exploit this vulnerability to compromise the affected system.
Remediation Fixed in version 3.4.0.. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-30829 vulnerability details – vuln.today
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