CVE-2026-55182

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Source
https://cve.org/CVERecord?id=CVE-2026-55182
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55182.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55182
Aliases
Published
2026-08-26T21:50:04Z
Modified
2026-10-28T02:30:48Z
Severity
  • 8.6 (High) CVSS_V4 - 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 CVSS Calculator
Summary
LibreNMS: Remote Code Execution by Signal Alert Transportation Module
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-77"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55182.json"
}
References

Affected packages

Git / github.com/librenms/librenms

Affected ranges

Type
GIT
Repo
https://github.com/librenms/librenms
Events
Introduced
fb2608ee3dafbaaeba51421fed1d221218699c39
Fixed
403fa2ddf262d4cbd7e1748ed7678468cc7248d1
Fixed
868e3b966a
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "21.6.0"
                },
                {
                    "fixed": "26.5.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "868e3b966a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "26.5.0",
            "range": [
                {
                    "fixed": "403fa2ddf262d4cbd7e1748ed7678468cc7248d1"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

21.*
21.10.0
21.11.0
21.12.0
21.12.1
21.6.0
21.7.0
21.8.0
21.9.0
22.*
22.1.0
22.10.0
22.11.0
22.12.0
22.2.0
22.2.1
22.3.0
22.4.0
22.5.0
22.6.0
22.7.0
22.8.0
22.9.0
23.*
23.1.0
23.10.0
23.11.0
23.2.0
23.4.0
23.4.1
23.5.0
23.6.0
23.7.0
23.8.0
23.8.1
23.8.2
23.9.0
23.9.1
24.*
24.1.0
24.10.0
24.10.1
24.11.0
24.12.0
24.2.0
24.3.0
24.4.0
24.4.1
24.5.0
24.6.0
24.7.0
24.8.0
24.9.0
24.9.1
25.*
25.1.0
25.10.0
25.11.0
25.12.0
25.2.0
25.3.0
25.4.0
25.5.0
25.6.0
25.7.0
25.8.0
25.9.0
26.*
26.1.0
26.2.0
26.3.0
26.3.1
26.4.0
26.4.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55182.json"