{"items":[{"id":"NVI-00003350","kind":"vulnerability","title":"LibreNMS Vulnerable to Remote Code Execution by Signal Alert Transportation module","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-c9fv-cgmm-2wg7","CVE-2026-55182"],"plain_summary":"OSV carries this publisher advisory for librenms/librenms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 26.5.0 for librenms/librenms. Confirm the publisher’s latest guidance.","source_ids":["sr-3b5ba8c9e548214438aacd8275c97e94"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-294a78bb0d022a8ef1153f919c034ea9"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-09-09T21:09:13.080Z","value":"8.6 HIGH (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-205c781f86aa99838354c2ee97064b73"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"1.607%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.7589. Missing scores are unknown.","source_id":"sr-294a78bb0d022a8ef1153f919c034ea9"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-3b5ba8c9e548214438aacd8275c97e94","url":"https://github.com/advisories/GHSA-c9fv-cgmm-2wg7","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-c9fv-cgmm-2wg7","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:10.697Z"},{"id":"sr-205c781f86aa99838354c2ee97064b73","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55182","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-55182","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:31.710Z"},{"id":"sr-294a78bb0d022a8ef1153f919c034ea9","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-55182","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.382Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3b5ba8c9e548214438aacd8275c97e94"],"technology":"librenms/librenms","known_exclusions":[],"conditions_summary":"### Summary\nA vulnerability has been identified that allows an authenticated administrator to execute arbitrary code on the host server. By adding an alert transport entry, an attacker with administrative privileges can execute malicious commands.\n\n### Details\nThe vulnerability is caused by an unsafe `exec` call in `deliverAlert` function of `LibreNMS/Alert/Transport/Signal.php`. Escapes for the path of `signal-cli` and the `Recipient` field are insufficient to prevent command-line injection. \n\nThe `composer_wrapper.php` under `scripts` is also vulnerable to command injection (unsafe `exec` calls) by passing the injected command as an argument, and it is accepting arguments passed by `deliverAlert`.\n\nBy chaining these unsafe `exec` calls, malicious admin user can execute any executables in the server's filesystem.\n\n### PoC\n\n1. Under Dashboard -> Alert -> Alert Transports\n\n\n\n2. Create a new Alert Transport entry.\n    a. Select `Signal` as `Transport type`.\n    b. Put `../scripts/composer_wrapper.php` into `Path`.\n    c. Put the command to execute under `R","public_affected_ranges":["ECOSYSTEM: introduced 21.6.0; fixed 26.5.0"]}],"null_published_at":"2026-11-01T14:34:07.566Z","source_updated_at":"2026-08-18T18:50:02.547Z","source_disclosed_at":"2026-08-18T17:59:56.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:10.697Z"},{"id":"NVI-00003350","kind":"vulnerability","title":"LibreNMS Vulnerable to Remote Code Execution by Signal Alert Transportation module","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-c9fv-cgmm-2wg7","CVE-2026-55182"],"plain_summary":"OSV carries this publisher advisory for librenms/librenms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 26.5.0 for librenms/librenms. Confirm the publisher’s latest guidance.","source_ids":["sr-3b5ba8c9e548214438aacd8275c97e94"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-294a78bb0d022a8ef1153f919c034ea9"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"1.607%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.7589. Missing scores are unknown.","source_id":"sr-294a78bb0d022a8ef1153f919c034ea9"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-3b5ba8c9e548214438aacd8275c97e94","url":"https://github.com/advisories/GHSA-c9fv-cgmm-2wg7","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-c9fv-cgmm-2wg7","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:10.697Z"},{"id":"sr-294a78bb0d022a8ef1153f919c034ea9","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-55182","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.382Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3b5ba8c9e548214438aacd8275c97e94"],"technology":"librenms/librenms","known_exclusions":[],"conditions_summary":"### Summary\nA vulnerability has been identified that allows an authenticated administrator to execute arbitrary code on the host server. By adding an alert transport entry, an attacker with administrative privileges can execute malicious commands.\n\n### Details\nThe vulnerability is caused by an unsafe `exec` call in `deliverAlert` function of `LibreNMS/Alert/Transport/Signal.php`. Escapes for the path of `signal-cli` and the `Recipient` field are insufficient to prevent command-line injection. \n\nThe `composer_wrapper.php` under `scripts` is also vulnerable to command injection (unsafe `exec` calls) by passing the injected command as an argument, and it is accepting arguments passed by `deliverAlert`.\n\nBy chaining these unsafe `exec` calls, malicious admin user can execute any executables in the server's filesystem.\n\n### PoC\n\n1. Under Dashboard -> Alert -> Alert Transports\n\n\n\n2. Create a new Alert Transport entry.\n    a. Select `Signal` as `Transport type`.\n    b. Put `../scripts/composer_wrapper.php` into `Path`.\n    c. Put the command to execute under `R","public_affected_ranges":["ECOSYSTEM: introduced 21.6.0; fixed 26.5.0"]}],"null_published_at":"2026-10-31T22:27:09.620Z","source_updated_at":"2026-08-18T18:50:02.547Z","source_disclosed_at":"2026-08-18T17:59:56.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:10.697Z"},{"id":"NVI-00003350","kind":"vulnerability","title":"LibreNMS Vulnerable to Remote Code Execution by Signal Alert Transportation module","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-c9fv-cgmm-2wg7","CVE-2026-55182"],"plain_summary":"OSV carries this publisher advisory for librenms/librenms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 26.5.0 for librenms/librenms. Confirm the publisher’s latest guidance.","source_ids":["sr-3b5ba8c9e548214438aacd8275c97e94"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-3b5ba8c9e548214438aacd8275c97e94","url":"https://github.com/advisories/GHSA-c9fv-cgmm-2wg7","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-c9fv-cgmm-2wg7","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:10.697Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3b5ba8c9e548214438aacd8275c97e94"],"technology":"librenms/librenms","known_exclusions":[],"conditions_summary":"### Summary\nA vulnerability has been identified that allows an authenticated administrator to execute arbitrary code on the host server. By adding an alert transport entry, an attacker with administrative privileges can execute malicious commands.\n\n### Details\nThe vulnerability is caused by an unsafe `exec` call in `deliverAlert` function of `LibreNMS/Alert/Transport/Signal.php`. Escapes for the path of `signal-cli` and the `Recipient` field are insufficient to prevent command-line injection. \n\nThe `composer_wrapper.php` under `scripts` is also vulnerable to command injection (unsafe `exec` calls) by passing the injected command as an argument, and it is accepting arguments passed by `deliverAlert`.\n\nBy chaining these unsafe `exec` calls, malicious admin user can execute any executables in the server's filesystem.\n\n### PoC\n\n1. Under Dashboard -> Alert -> Alert Transports\n\n\n\n2. Create a new Alert Transport entry.\n    a. Select `Signal` as `Transport type`.\n    b. Put `../scripts/composer_wrapper.php` into `Path`.\n    c. Put the command to execute under `R","public_affected_ranges":["ECOSYSTEM: introduced 21.6.0; fixed 26.5.0"]}],"null_published_at":"2026-10-31T22:12:48.013Z","source_updated_at":"2026-08-18T18:50:02.547Z","source_disclosed_at":"2026-08-18T17:59:56.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:42:10.697Z"}],"next_cursor":null,"snapshot_revision":"42594"}