CVE-2026-48549CWE-352csrf

CVE-2026-48549

Medium · published August 26, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
16.3
In the wild
Unconfirmed
What it is

Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 contains a CSRF vulnerability in cmd.cgi. When no Cookie header is present, the double-submit cookie protection can be bypassed by supplying matching NagFormId and nagFormId values in the POST body, allowing a cross-site request to execute Nagios commands as a currently authenticated user.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00256 · 16.3th percentile
Weakness
CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-08-26T20:16Z
References (3)
https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog · [email protected]https://www.nagios.com/security-disclosures/nagios-core/ · [email protected]https://www.vulncheck.com/advisories/nagios-core-xi-csrf-via-cmd-cgi-double-submit-cookie · [email protected]
EPSS history
Timeline
  • 28 AUG 06:44Z
    EPSS moved — → 0%
    epss
  • 26 AUG 15:37Z
    Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie
    cvelistv5