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    180 vulnerabilities found for Checkmk by Checkmk GmbH

    CVE-2026-92882 (GCVE-0-2026-92882)

    Vulnerability from nvd – Published: 2026-09-22 10:42 – Updated: 2026-09-22 10:42
    VLAI
    Title
    Redact SNMP community, SNMPv3 pass phrases, and IPMI password in host config REST API GET responses
    Summary
    Insufficiently protected credentials in the host and folder configuration endpoints of the REST API in Checkmk <2.5.0p15, <2.4.0p37, <2.3.0p51 and 2.2.0 (EOL) allows an authenticated user who may view a host's configuration to read stored SNMP community strings, SNMPv3 auth and privacy pass phrases and IPMI passwords in clear text from GET responses, although the setup GUI never displays these values.
    CWE
    • CWE-522 - Insufficiently Protected Credentials
    References
    URL Tags
    https://checkmk.com/werk/20077 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p15 (semver)
    Affected: 2.4.0 , < 2.4.0p37 (semver)
    Affected: 2.3.0 , < 2.3.0p51 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-90990 (GCVE-0-2026-90990)

    Vulnerability from nvd – Published: 2026-09-22 10:43 – Updated: 2026-09-22 10:43
    VLAI
    Title
    Livestatus injection via monitoring filter values
    Summary
    Improper neutralization of newlines in filter values in the monitoring host and service list APIs in Checkmk <2.5.0p14 allows an authenticated user to inject additional Livestatus query headers, bypassing object visibility restrictions in count queries to infer information about hosts and services outside their contact groups and occupying web server and Livestatus workers for an attacker-controlled duration.
    CWE
    • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
    References
    URL Tags
    https://checkmk.com/werk/19604 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p14 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-77021 (GCVE-0-2026-77021)

    Vulnerability from nvd – Published: 2026-09-21 10:57 – Updated: 2026-09-21 19:40
    VLAI
    Title
    Missing decompression size limit in agent receiver allows memory exhaustion via push agent data
    Summary
    Improper handling of highly compressed data (data amplification) in Checkmk <2.5.0p14, <2.4.0p37, <2.3.0p51 and 2.2.0 (EOL) allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an arbitrary size.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-21 14:40 UTC
    CWE
    • CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
    References
    URL Tags
    https://checkmk.com/werk/22116 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p14 (semver)
    Affected: 2.4.0 , < 2.4.0p37 (semver)
    Affected: 2.3.0 , < 2.3.0p51 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-15937 (GCVE-0-2026-15937)

    Vulnerability from nvd – Published: 2026-09-04 08:24 – Updated: 2026-09-04 19:39
    VLAI
    Title
    Agent receiver certificate confusion allows authentication with a certificate issued for another endpoint
    Summary
    Improper certificate validation in Checkmk <2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoints do not verify that the certificate was issued by their own root certificate.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-04 19:39 UTC
    CWE
    • CWE-295 - Improper Certificate Validation
    References
    URL Tags
    https://checkmk.com/werk/19735 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p10 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-17548 (GCVE-0-2026-17548)

    Vulnerability from nvd – Published: 2026-08-25 08:35 – Updated: 2026-08-25 19:48
    VLAI
    Title
    Missing authorization for viewing background jobs
    Summary
    Missing authorization in Checkmk <2.5.0p12, <2.4.0p36, <2.3.0p50 and all 2.2.0 versions allows an authenticated user who knows the ID of a background job to view that job's status and results.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-25 19:48 UTC
    CWE
    References
    URL Tags
    https://checkmk.com/werk/22115 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p12 (semver)
    Affected: 2.4.0 , < 2.4.0p36 (semver)
    Affected: 2.3.0 , < 2.3.0p50 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-15576 (GCVE-0-2026-15576)

    Vulnerability from nvd – Published: 2026-08-21 11:10 – Updated: 2026-08-21 11:53
    VLAI
    Title
    Agent receiver accepts mTLS requests without a client certificate
    Summary
    Improper authentication in the agent receiver of Checkmk <2.5.0p10 allows an unauthenticated remote attacker to bypass mutual TLS client certificate verification of relay endpoints by supplying a fixed placeholder identity in the request URL, resulting in limited impact on integrity and availability. Only the Cloud, Ultimate and Ultimate MT editions are affected, as other editions do not expose relay endpoints.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-21 11:53 UTC
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    References
    URL Tags
    https://checkmk.com/werk/20174 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p10 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-7485 (GCVE-0-2026-7485)

    Vulnerability from nvd – Published: 2026-08-20 12:12 – Updated: 2026-08-26 14:16
    VLAI
    Title
    Frozen BI aggregations leak host and service names to unauthorized users
    Summary
    Incorrect authorization in frozen BI aggregations in Checkmk <2.5.0p2, <2.4.0p29, <2.3.0p47, and all 2.2.0 versions allows an authenticated user with restricted host and service visibility to learn the names and the existence of hosts and services they are not authorized to see.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-20 13:27 UTC
    CWE
    • CWE-863 - Incorrect Authorization
    References
    URL Tags
    https://checkmk.com/werk/16917 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p2 (semver)
    Affected: 2.4.0 , < 2.4.0p29 (semver)
    Affected: 2.3.0 , < 2.3.0p47 (semver)
    Affected: 2.2.0 (semver)
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        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-15227 (GCVE-0-2026-15227)

    Vulnerability from nvd – Published: 2026-07-31 12:21 – Updated: 2026-07-31 19:50
    VLAI
    Title
    Missing Authorization Allows Editing of Foreign Reports
    Summary
    Missing authorization in Checkmk <2.5.0p10, <2.4.0p35, <2.3.0p49, and 2.2.0 (EOL) allows an authenticated user lacking the "Edit foreign Reports" permission to modify reports owned by other users.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-31 19:50 UTC
    CWE
    References
    URL Tags
    https://checkmk.com/werk/20003 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p10 (semver)
    Affected: 2.4.0 , < 2.4.0p35 (semver)
    Affected: 2.3.0 , < 2.3.0p49 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-8593 (GCVE-0-2026-8593)

    Vulnerability from nvd – Published: 2026-07-21 07:20 – Updated: 2026-07-21 12:16
    VLAI
    Title
    Fix Business Intelligence API Pack permission
    Summary
    Improper permission enforcement in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before 2.3.0p49, and 2.2.0 (EOL) allows users without permissions to view and modify BI packs and rules
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-21 12:16 UTC
    CWE
    References
    URL Tags
    https://checkmk.com/werk/16918 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p9 (semver)
    Affected: 2.4.0 , < 2.4.0p34 (semver)
    Affected: 2.3.0 , < 2.3.0p49 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-14852 (GCVE-0-2026-14852)

    Vulnerability from nvd – Published: 2026-07-14 09:26 – Updated: 2026-07-29 19:26
    VLAI
    Title
    mk_sap_hana: Privilege escalation via crafted sapstartsrv process name
    Summary
    Privilege escalation in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before 2.3.0p49, and 2.2.0 (EOL) allows a local unprivileged user to execute arbitrary commands as root by starting a process crafted to look like a SAP HANA instance. Without an explicit database configuration, the mk_sap_hana agent plugin derives instance identifiers from the process list and uses them to build a command executed with elevated privileges (requires the plugin to run as root with RUNAS=agent).
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-15 04:00 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    References
    URL Tags
    https://checkmk.com/werk/20104 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p9 (semver)
    Affected: 2.4.0 , < 2.4.0p34 (semver)
    Affected: 2.3.0 , < 2.3.0p49 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-9549 (GCVE-0-2026-9549)

    Vulnerability from nvd – Published: 2026-06-08 12:07 – Updated: 2026-06-08 13:02
    VLAI
    Title
    Fix XSS in service discovery active check output
    Summary
    Stored cross-site scripting in the service discovery active check output in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can configure active or custom checks to inject malicious HTML or JavaScript into check output that executes in the browser of an admin or a user with host read permissions when they run the check on the service discovery page.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:02 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/17993 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-8833 (GCVE-0-2026-8833)

    Vulnerability from nvd – Published: 2026-06-08 12:06 – Updated: 2026-06-08 13:02
    VLAI
    Title
    XSS in urls
    Summary
    Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an authenticated user to bypass URL validation and inject malicious URLs such as javascript: URIs, resulting in cross-site scripting when another user interacts with the crafted link.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:02 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/20002 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-8078 (GCVE-0-2026-8078)

    Vulnerability from nvd – Published: 2026-06-08 12:06 – Updated: 2026-06-08 13:03
    VLAI
    Title
    Fix stored XSS in global settings change log
    Summary
    Stored cross-site scripting in the global settings change log in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can change global settings to store malicious HTML or JavaScript in changelog messages that executes in other users' browsers when they view the Activate Changes page or Audit log.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:03 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/17992 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
    Affected: 2.2.0 (semver)
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    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-7765 (GCVE-0-2026-7765)

    Vulnerability from nvd – Published: 2026-06-08 12:06 – Updated: 2026-06-08 13:04
    VLAI
    Title
    User Messages widget leaked issuer messages on shared dashboards
    Summary
    Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows a valid public dashboard share token to read the issuer's personal messages by sending requests to the underlying endpoint, even without a User Messages widget present.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:04 UTC
    CWE
    • CWE-863 - Incorrect Authorization
    References
    URL Tags
    https://checkmk.com/werk/19815 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-7186 (GCVE-0-2026-7186)

    Vulnerability from nvd – Published: 2026-06-08 12:05 – Updated: 2026-06-08 13:15
    VLAI
    Title
    Fix stored XSS in URL dashboard widget via dangerous URI schemes
    Summary
    Stored cross-site scripting in the URL dashboard widget in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows a user with dashboard editing permissions to store a URL with a dangerous URI scheme such as javascript: that executes scripts in other users' browsers when they view the dashboard.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:15 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/17991 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
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        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-90990 (GCVE-0-2026-90990)

    Vulnerability from cvelistv5 – Published: 2026-09-22 10:43 – Updated: 2026-09-22 10:43
    VLAI
    Title
    Livestatus injection via monitoring filter values
    Summary
    Improper neutralization of newlines in filter values in the monitoring host and service list APIs in Checkmk <2.5.0p14 allows an authenticated user to inject additional Livestatus query headers, bypassing object visibility restrictions in count queries to infer information about hosts and services outside their contact groups and occupying web server and Livestatus workers for an attacker-controlled duration.
    CWE
    • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
    References
    URL Tags
    https://checkmk.com/werk/19604 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p14 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-92882 (GCVE-0-2026-92882)

    Vulnerability from cvelistv5 – Published: 2026-09-22 10:42 – Updated: 2026-09-22 10:42
    VLAI
    Title
    Redact SNMP community, SNMPv3 pass phrases, and IPMI password in host config REST API GET responses
    Summary
    Insufficiently protected credentials in the host and folder configuration endpoints of the REST API in Checkmk <2.5.0p15, <2.4.0p37, <2.3.0p51 and 2.2.0 (EOL) allows an authenticated user who may view a host's configuration to read stored SNMP community strings, SNMPv3 auth and privacy pass phrases and IPMI passwords in clear text from GET responses, although the setup GUI never displays these values.
    CWE
    • CWE-522 - Insufficiently Protected Credentials
    References
    URL Tags
    https://checkmk.com/werk/20077 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p15 (semver)
    Affected: 2.4.0 , < 2.4.0p37 (semver)
    Affected: 2.3.0 , < 2.3.0p51 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-77021 (GCVE-0-2026-77021)

    Vulnerability from cvelistv5 – Published: 2026-09-21 10:57 – Updated: 2026-09-21 19:40
    VLAI
    Title
    Missing decompression size limit in agent receiver allows memory exhaustion via push agent data
    Summary
    Improper handling of highly compressed data (data amplification) in Checkmk <2.5.0p14, <2.4.0p37, <2.3.0p51 and 2.2.0 (EOL) allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an arbitrary size.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-21 14:40 UTC
    CWE
    • CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
    References
    URL Tags
    https://checkmk.com/werk/22116 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p14 (semver)
    Affected: 2.4.0 , < 2.4.0p37 (semver)
    Affected: 2.3.0 , < 2.3.0p51 (semver)
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    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-15937 (GCVE-0-2026-15937)

    Vulnerability from cvelistv5 – Published: 2026-09-04 08:24 – Updated: 2026-09-04 19:39
    VLAI
    Title
    Agent receiver certificate confusion allows authentication with a certificate issued for another endpoint
    Summary
    Improper certificate validation in Checkmk <2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoints do not verify that the certificate was issued by their own root certificate.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-04 19:39 UTC
    CWE
    • CWE-295 - Improper Certificate Validation
    References
    URL Tags
    https://checkmk.com/werk/19735 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p10 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-17548 (GCVE-0-2026-17548)

    Vulnerability from cvelistv5 – Published: 2026-08-25 08:35 – Updated: 2026-08-25 19:48
    VLAI
    Title
    Missing authorization for viewing background jobs
    Summary
    Missing authorization in Checkmk <2.5.0p12, <2.4.0p36, <2.3.0p50 and all 2.2.0 versions allows an authenticated user who knows the ID of a background job to view that job's status and results.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-25 19:48 UTC
    CWE
    References
    URL Tags
    https://checkmk.com/werk/22115 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p12 (semver)
    Affected: 2.4.0 , < 2.4.0p36 (semver)
    Affected: 2.3.0 , < 2.3.0p50 (semver)
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        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-15576 (GCVE-0-2026-15576)

    Vulnerability from cvelistv5 – Published: 2026-08-21 11:10 – Updated: 2026-08-21 11:53
    VLAI
    Title
    Agent receiver accepts mTLS requests without a client certificate
    Summary
    Improper authentication in the agent receiver of Checkmk <2.5.0p10 allows an unauthenticated remote attacker to bypass mutual TLS client certificate verification of relay endpoints by supplying a fixed placeholder identity in the request URL, resulting in limited impact on integrity and availability. Only the Cloud, Ultimate and Ultimate MT editions are affected, as other editions do not expose relay endpoints.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-21 11:53 UTC
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    References
    URL Tags
    https://checkmk.com/werk/20174 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p10 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-7485 (GCVE-0-2026-7485)

    Vulnerability from cvelistv5 – Published: 2026-08-20 12:12 – Updated: 2026-08-26 14:16
    VLAI
    Title
    Frozen BI aggregations leak host and service names to unauthorized users
    Summary
    Incorrect authorization in frozen BI aggregations in Checkmk <2.5.0p2, <2.4.0p29, <2.3.0p47, and all 2.2.0 versions allows an authenticated user with restricted host and service visibility to learn the names and the existence of hosts and services they are not authorized to see.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-20 13:27 UTC
    CWE
    • CWE-863 - Incorrect Authorization
    References
    URL Tags
    https://checkmk.com/werk/16917 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p2 (semver)
    Affected: 2.4.0 , < 2.4.0p29 (semver)
    Affected: 2.3.0 , < 2.3.0p47 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-15227 (GCVE-0-2026-15227)

    Vulnerability from cvelistv5 – Published: 2026-07-31 12:21 – Updated: 2026-07-31 19:50
    VLAI
    Title
    Missing Authorization Allows Editing of Foreign Reports
    Summary
    Missing authorization in Checkmk <2.5.0p10, <2.4.0p35, <2.3.0p49, and 2.2.0 (EOL) allows an authenticated user lacking the "Edit foreign Reports" permission to modify reports owned by other users.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-31 19:50 UTC
    CWE
    References
    URL Tags
    https://checkmk.com/werk/20003 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p10 (semver)
    Affected: 2.4.0 , < 2.4.0p35 (semver)
    Affected: 2.3.0 , < 2.3.0p49 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-8593 (GCVE-0-2026-8593)

    Vulnerability from cvelistv5 – Published: 2026-07-21 07:20 – Updated: 2026-07-21 12:16
    VLAI
    Title
    Fix Business Intelligence API Pack permission
    Summary
    Improper permission enforcement in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before 2.3.0p49, and 2.2.0 (EOL) allows users without permissions to view and modify BI packs and rules
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-21 12:16 UTC
    CWE
    References
    URL Tags
    https://checkmk.com/werk/16918 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p9 (semver)
    Affected: 2.4.0 , < 2.4.0p34 (semver)
    Affected: 2.3.0 , < 2.3.0p49 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-14852 (GCVE-0-2026-14852)

    Vulnerability from cvelistv5 – Published: 2026-07-14 09:26 – Updated: 2026-07-29 19:26
    VLAI
    Title
    mk_sap_hana: Privilege escalation via crafted sapstartsrv process name
    Summary
    Privilege escalation in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before 2.3.0p49, and 2.2.0 (EOL) allows a local unprivileged user to execute arbitrary commands as root by starting a process crafted to look like a SAP HANA instance. Without an explicit database configuration, the mk_sap_hana agent plugin derives instance identifiers from the process list and uses them to build a command executed with elevated privileges (requires the plugin to run as root with RUNAS=agent).
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-15 04:00 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    References
    URL Tags
    https://checkmk.com/werk/20104 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p9 (semver)
    Affected: 2.4.0 , < 2.4.0p34 (semver)
    Affected: 2.3.0 , < 2.3.0p49 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-9549 (GCVE-0-2026-9549)

    Vulnerability from cvelistv5 – Published: 2026-06-08 12:07 – Updated: 2026-06-08 13:02
    VLAI
    Title
    Fix XSS in service discovery active check output
    Summary
    Stored cross-site scripting in the service discovery active check output in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can configure active or custom checks to inject malicious HTML or JavaScript into check output that executes in the browser of an admin or a user with host read permissions when they run the check on the service discovery page.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:02 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/17993 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-8833 (GCVE-0-2026-8833)

    Vulnerability from cvelistv5 – Published: 2026-06-08 12:06 – Updated: 2026-06-08 13:02
    VLAI
    Title
    XSS in urls
    Summary
    Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an authenticated user to bypass URL validation and inject malicious URLs such as javascript: URIs, resulting in cross-site scripting when another user interacts with the crafted link.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:02 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/20002 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
        cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-8078 (GCVE-0-2026-8078)

    Vulnerability from cvelistv5 – Published: 2026-06-08 12:06 – Updated: 2026-06-08 13:03
    VLAI
    Title
    Fix stored XSS in global settings change log
    Summary
    Stored cross-site scripting in the global settings change log in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can change global settings to store malicious HTML or JavaScript in changelog messages that executes in other users' browsers when they view the Activate Changes page or Audit log.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:03 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/17992 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-7765 (GCVE-0-2026-7765)

    Vulnerability from cvelistv5 – Published: 2026-06-08 12:06 – Updated: 2026-06-08 13:04
    VLAI
    Title
    User Messages widget leaked issuer messages on shared dashboards
    Summary
    Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows a valid public dashboard share token to read the issuer's personal messages by sending requests to the underlying endpoint, even without a User Messages widget present.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:04 UTC
    CWE
    • CWE-863 - Incorrect Authorization
    References
    URL Tags
    https://checkmk.com/werk/19815 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-7186 (GCVE-0-2026-7186)

    Vulnerability from cvelistv5 – Published: 2026-06-08 12:05 – Updated: 2026-06-08 13:15
    VLAI
    Title
    Fix stored XSS in URL dashboard widget via dangerous URI schemes
    Summary
    Stored cross-site scripting in the URL dashboard widget in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows a user with dashboard editing permissions to store a URL with a dangerous URI scheme such as javascript: that executes scripts in other users' browsers when they view the dashboard.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-08 13:15 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    URL Tags
    https://checkmk.com/werk/17991 vendor-advisory
    Impacted products
    Vendor Product Version
    Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0p5 (semver)
    Affected: 2.4.0 , < 2.4.0p31 (semver)
    Affected: 2.3.0 , < 2.3.0p48 (semver)
    Affected: 2.2.0 (semver)
        cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
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    Create a notification for this product.
    Show details on NVD website

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