{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-48553 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-48553 is a high-severity command injection vulnerability in Nagios Core, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-48553 and fix it if it is affected.\n\nWhat it is: CVE-2026-48553 is a high-severity command injection vulnerability in Nagios Core, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-48553 in the wild and no public exploit code.\n\nAffected product: Nagios Core. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-48553/ (Markdown: https://insights.sbomify.com/CVE-2026-48553/index.md)","id":"CVE-2026-48553","markdown":"https://insights.sbomify.com/CVE-2026-48553/index.md","name":"CVE-2026-48553","record":{"aliases":["DEBIAN-CVE-2026-48553","GHSA-r6wg-9vj9-rm67","UBUNTU-CVE-2026-48553"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Nagios monitoring server","requires_auth":"low_privilege","summary":"Authenticated attackers can execute arbitrary OS commands via macro injection in custom variables if referenced in shell commands.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Nagios Core / XI Authenticated RCE via Custom-Variable Macro Injection","id":"CVE-2026-48553","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"command_injection","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Nagios Core / XI Authenticated RCE via Unfiltered NOTIFICATION-Family Macro Substitution","id":"CVE-2026-48554"},"packages":[],"prev":{"headline":"Nagios Core / XI DOM-based XSS via jsonquery.js","id":"CVE-2026-48552"},"products":["Nagios Core","Nagios XI"],"published":"2026-08-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-14","vendors":["Nagios Enterprises, LLC."]},"summary":"Authenticated attackers can execute arbitrary OS commands via macro injection in custom variables if referenced in shell commands.","url":"https://insights.sbomify.com/CVE-2026-48553/"}