CVE-2026-48549— Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie
Quick assessment
Affected
Nagios Enterprises, LLC. Nagios Core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Nagios Core 4.5.13 之前版本以及 Nagios XI 2026R1.5 之前版本在 中存在 CSRF（跨站请求伪造）漏洞。当请求中未包含 Cookie 头时，攻击者可以通过在 POST 请求体中提供相匹配的 和 值来绕过“双重提交 Cookie”防护机制，从而允许跨站请求以当前已认证用户的身份执行 Nagios 命令。
Affected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Nagios Enterprises, LLC. | Nagios Core | < 4.5.13 |
affected |
| Nagios Enterprises, LLC. | Nagios XI | < 2026R1.5 |
affected |
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I. Basic Information for CVE-2026-48549
Vulnerability Information
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Vulnerability Title
Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Nagios Enterprises, LLC. | Nagios Core | 0 ~ 4.5.13 | - |
|
| Nagios Enterprises, LLC. | Nagios XI | 0 ~ 2026R1.5 | - |
|
II. Public POCs for CVE-2026-48549
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-48549 (2)
-
🔗 Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie | Advisories | VulnCheck third-party-advisory
-
Vendor Pages for CVE-2026-48549 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-48549
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