{"id":"CVE-2026-48551","title":"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","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 p…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N","cwe":["CWE-352"],"published":"2026-08-12","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:28:37.587","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48551","references":[{"url":"https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog","label":"disclosure@vulncheck.com"},{"url":"https://www.nagios.com/security-disclosures/nagios-core/","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nagios-core-xi-csrf-protection-bypass-via-double-submit-cookie","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00173,"epssPercentile":0.07042,"ingestedAt":"2026-09-08T21:11:12.276Z","slug":"CVE-2026-48551","body":"## Overview\n\nNagios 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}