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    10 vulnerabilities found for Nagios Core by Nagios Enterprises, LLC.

    CVE-2026-48554 (GCVE-0-2026-48554)

    Vulnerability from nvd – Published: 2026-08-12 16:48 – Updated: 2026-08-14 16:50
    VLAI
    Title
    Nagios Core / XI Authenticated RCE via Unfiltered NOTIFICATION-Family Macro Substitution
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to authenticated remote code execution via unfiltered NOTIFICATION-family macro substitution through the com_data parameter. When a notification command references $NOTIFICATIONCOMMENT$ or $NOTIFICATIONAUTHOR$ in a shell-reachable position, authenticated UI users can run arbitrary commands as the nagios user. Exploitation requires a non-default configuration in which a notification command references these macros in a shell-executed command line.
    Severity
    7.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 17:59 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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    CVE-2026-48553 (GCVE-0-2026-48553)

    Vulnerability from nvd – Published: 2026-08-12 16:46 – Updated: 2026-08-14 16:50
    VLAI
    Title
    Nagios Core / XI Authenticated RCE via Custom-Variable Macro Injection
    Summary
    Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authenticated remote code execution via custom-variable macro injection through the Nagios Remote Data Processor (NRDP). When a custom variable defined on a host, service, or contact is referenced in a shell-executed command line, an authenticated attacker with NRDP access can inject OS commands through the macro value. Exploitation requires a non-default configuration in which a custom variable is defined and referenced in a shell-executed command.
    Severity
    7.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 17:55 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Show details on NVD website
    To clipboard 

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    CVE-2026-48552 (GCVE-0-2026-48552)

    Vulnerability from nvd – Published: 2026-08-12 16:34 – Updated: 2026-08-14 16:49
    VLAI
    Title
    Nagios Core / XI DOM-based XSS via jsonquery.js
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.
    Severity
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
    5.4 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 16:46 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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    CVE-2026-48551 (GCVE-0-2026-48551)

    Vulnerability from nvd – Published: 2026-08-12 16:32 – Updated: 2026-08-14 16:49
    VLAI
    Title
    Nagios Core / XI CSRF Protection Bypass via Double-Submit Cookie
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass via a self-supplied double-submit cookie. An attacker can supply matching cookie and request parameter values to bypass CSRF protection, enabling unauthenticated attackers to run commands as authorized users via malicious links.
    Severity
    6.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
    7.4 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-13 16:25 UTC
    CWE
    • CWE-352 - Cross-Site Request Forgery (CSRF)
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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    CVE-2026-48550 (GCVE-0-2026-48550)

    Vulnerability from nvd – Published: 2026-08-12 16:30 – Updated: 2026-08-14 16:49
    VLAI
    Title
    Nagios Core / XI cmd.cgi Reflected XSS via NagFormId Parameter
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to reflected cross-site scripting in cmd.cgi via the NagFormId parameter. An unauthenticated remote attacker can craft a malicious link that, when followed by an authenticated user, executes arbitrary JavaScript in the victim's browser.
    Severity
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
    6.1 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 18:14 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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    CVE-2026-48554 (GCVE-0-2026-48554)

    Vulnerability from cvelistv5 – Published: 2026-08-12 16:48 – Updated: 2026-08-14 16:50
    VLAI
    Title
    Nagios Core / XI Authenticated RCE via Unfiltered NOTIFICATION-Family Macro Substitution
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to authenticated remote code execution via unfiltered NOTIFICATION-family macro substitution through the com_data parameter. When a notification command references $NOTIFICATIONCOMMENT$ or $NOTIFICATIONAUTHOR$ in a shell-reachable position, authenticated UI users can run arbitrary commands as the nagios user. Exploitation requires a non-default configuration in which a notification command references these macros in a shell-executed command line.
    Severity
    7.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 17:59 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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    CVE-2026-48553 (GCVE-0-2026-48553)

    Vulnerability from cvelistv5 – Published: 2026-08-12 16:46 – Updated: 2026-08-14 16:50
    VLAI
    Title
    Nagios Core / XI Authenticated RCE via Custom-Variable Macro Injection
    Summary
    Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authenticated remote code execution via custom-variable macro injection through the Nagios Remote Data Processor (NRDP). When a custom variable defined on a host, service, or contact is referenced in a shell-executed command line, an authenticated attacker with NRDP access can inject OS commands through the macro value. Exploitation requires a non-default configuration in which a custom variable is defined and referenced in a shell-executed command.
    Severity
    7.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 17:55 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Show details on NVD website
    To clipboard 

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    CVE-2026-48552 (GCVE-0-2026-48552)

    Vulnerability from cvelistv5 – Published: 2026-08-12 16:34 – Updated: 2026-08-14 16:49
    VLAI
    Title
    Nagios Core / XI DOM-based XSS via jsonquery.js
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.
    Severity
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
    5.4 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 16:46 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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    CVE-2026-48551 (GCVE-0-2026-48551)

    Vulnerability from cvelistv5 – Published: 2026-08-12 16:32 – Updated: 2026-08-14 16:49
    VLAI
    Title
    Nagios Core / XI CSRF Protection Bypass via Double-Submit Cookie
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass via a self-supplied double-submit cookie. An attacker can supply matching cookie and request parameter values to bypass CSRF protection, enabling unauthenticated attackers to run commands as authorized users via malicious links.
    Severity
    6.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
    7.4 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-13 16:25 UTC
    CWE
    • CWE-352 - Cross-Site Request Forgery (CSRF)
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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    CVE-2026-48550 (GCVE-0-2026-48550)

    Vulnerability from cvelistv5 – Published: 2026-08-12 16:30 – Updated: 2026-08-14 16:49
    VLAI
    Title
    Nagios Core / XI cmd.cgi Reflected XSS via NagFormId Parameter
    Summary
    Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to reflected cross-site scripting in cmd.cgi via the NagFormId parameter. An unauthenticated remote attacker can craft a malicious link that, when followed by an authenticated user, executes arbitrary JavaScript in the victim's browser.
    Severity
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
    6.1 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-12 18:14 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Date Public
    2026-08-05 00:00
    Credits
    Zach Hanley of Horizon3.ai
    Show details on NVD website
    To clipboard 

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