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  4. CVE 2026 48549 nagios core xi csrf via cmdcgi double submit
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-48549

Nagios Core / XI CSRF via cmd.cgi Double-Submit CookieCVE-2026-48549

Answer in brief

CVE-2026-48549 records a Medium severity (CVSS 6.5) vulnerability in Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie. The current sources do not mark it as known exploited. The current feed maps Nagios Enterprises, LLC./Nagios Core (generic), Nagios Enterprises, LLC./Nagios Core (generic), Nagios Enterprises, LLC./Nagios XI (generic), Nagios Enterprises, LLC./Nagios XI (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 26, 2026Updated Sep 24, 2026Source checked Oct 10, 2026First seen by HOL Aug 26, 2026Material review Sep 24, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Nagios Enterprises, LLC./Nagios Core (generic), Nagios Enterprises, LLC./Nagios Core (generic), Nagios Enterprises, LLC./Nagios XI (generic), Nagios Enterprises, LLC./Nagios XI (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Nagios Enterprises, LLC./Nagios Coregeneric>=0 <4.5.134.5.13
Nagios Enterprises, LLC./Nagios Coregeneric*Not reported
Nagios Enterprises, LLC./Nagios XIgeneric>=0 <2026R1.52026R1.5
Nagios Enterprises, LLC./Nagios XIgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Nagios Enterprises, LLC./Nagios Core, Nagios Enterprises, LLC./Nagios Core, Nagios Enterprises, LLC./Nagios XI.
  2. 2Review the reported fix. Update Nagios Enterprises, LLC./Nagios Core to 4.5.13; Nagios Enterprises, LLC./Nagios XI to 2026R1.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 26, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencenagios.com
  • Source referencevulncheck.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • OpenRefine through 3.10.1 CSRF to RCE via get-rows CommandAlso CWE-352
  • ExtUtils::Typemaps::STL::Vector versions before 1.05 for Perl allocate a 32 GiB array on an empty listSame generic ecosystem
  • WordPress Forminator plugin <= 1.57.3 - Cross Site Scripting (XSS) vulnerabilitySame generic ecosystem
  • WordPress Thank You Page Customizer for WooCommerce plugin <= 1.2.3 - Content Injection vulnerabilitySame generic ecosystem
  • WordPress GIFT4U plugin <= 1.1.3 - Broken Access Control vulnerabilitySame generic ecosystem
  • Apache DataSketches: datasketches-cpp: Out-of-bounds read in VarOpt union deserialization allows denial of service via a truncated sketchSame generic ecosystem

Record context

Vulnerability class
CSRF
EPSS
Not reported
CWE IDs
CWE-352
Source
CVE List V5
Source checked
Oct 10, 2026
References
3 linked sources
Open source record