{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55182",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-16T15:20:43.086Z",
        "datePublished": "2026-08-26T21:50:04.014Z",
        "dateUpdated": "2026-08-26T21:50:04.014Z"
    },
    "containers": {
        "cna": {
            "title": "LibreNMS: Remote Code Execution by Signal Alert Transportation Module",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-77",
                            "lang": "en",
                            "description": "CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "HIGH",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.6,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/librenms/librenms/security/advisories/GHSA-c9fv-cgmm-2wg7",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/librenms/librenms/security/advisories/GHSA-c9fv-cgmm-2wg7"
                },
                {
                    "name": "https://github.com/librenms/librenms/commit/868e3b966a",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/librenms/librenms/commit/868e3b966a"
                },
                {
                    "name": "https://github.com/librenms/librenms/releases/tag/26.5.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/librenms/librenms/releases/tag/26.5.0"
                }
            ],
            "affected": [
                {
                    "vendor": "librenms",
                    "product": "librenms",
                    "versions": [
                        {
                            "version": ">= 21.6.0, < 26.5.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-26T21:50:04.014Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "LibreNMS is a network monitoring system. In versions from 21.6.0 up to 26.5.0, the Signal alert transport is vulnerable to command injection because the signal-cli path and the Recipient field of an alert transport entry are insufficiently escaped before being passed to an exec call. An authenticated administrator can craft a transport entry whose Recipient contains shell metacharacters and whose path points to the bundled composer_wrapper.php script, which itself passes attacker-controlled input to further unsafe exec calls. By chaining these calls, the administrator can execute arbitrary operating-system commands on the LibreNMS host. This issue is fixed in version 26.5.0."
                }
            ],
            "source": {
                "advisory": "GHSA-c9fv-cgmm-2wg7",
                "discovery": "UNKNOWN"
            }
        }
    }
}