{"items":[{"id":"NVI-00011986","kind":"vulnerability","title":"Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE","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-9jww-cxg5-rj9m","CVE-2026-84318"],"plain_summary":"GitHub lists this reviewed advisory for github.com/0xJacky/Nginx-UI. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-07dbe4b54c76e64934192b9b56c4c2da"],"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":"2026-10-15T20:11:19.000Z","value":"8.8 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-7b779c8357f5c5369c38ba356cd0ac62"},{"kind":"CVSS","as_of":"2026-10-13T15:17:50.383Z","value":"8.8 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-789b3fa6d799113056db8f9599b155a5"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.816%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.57203. Missing scores are unknown.","source_id":"sr-07dbe4b54c76e64934192b9b56c4c2da"}],"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-7b779c8357f5c5369c38ba356cd0ac62","url":"https://github.com/advisories/GHSA-9jww-cxg5-rj9m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9jww-cxg5-rj9m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"},{"id":"sr-789b3fa6d799113056db8f9599b155a5","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84318","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-84318","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:59:21.684Z"},{"id":"sr-07dbe4b54c76e64934192b9b56c4c2da","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-2026-84318","publisher":"FIRST EPSS","observed_at":"2026-11-04T23:33:33.072Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7b779c8357f5c5369c38ba356cd0ac62"],"technology":"github.com/0xJacky/Nginx-UI","known_exclusions":[],"conditions_summary":"### Summary\n\nThe MCP tool `nginx_config_add` writes nginx configuration files to disk and triggers an nginx reload without calling `config.ValidateConfigFile`. The identical flow in the REST API (`POST /api/configs`) does call that function and correctly rejects dangerous directives. An authenticated attacker can exploit this gap to write config files containing any blocked directive (`perl`, `js_import`, `load_module`, `user root`, etc.), bypassing nginx-ui's entire security layer. On a server with the nginx Perl, njs, or Lua module loaded, this is post-authentication Remote Code Execution.\n\n### Details\n\n`api/config/add.go` (line 46) calls `config.ValidateConfigFile` before writing:\n\n```go\nerr = config.ValidateConfigFile(path, content)  // validates directives, checks blocklist\nif err != nil {\n    cosy.ErrHandler(c, err)\n    return\n}\n```\n\n`mcp/config/config_add.go` (line 79) omits that call entirely and writes directly:\n\n```go\nerr = os.WriteFile(path, []byte(content), 0644)  // no ValidateConfigFile, no blocklist check\n...\nres := nginx.Control(nginx.Reload)               // reload triggered immediately\n```\n\n`config.ValidateConfigFile` runs two checks:\n- **`ValidateConfigContent`**","public_affected_ranges":[">= 1.9.10-0.20250506154222-1330888280a2, < 1.9.10-0.20260703131214-23d1934099b0"]}],"null_published_at":"2026-11-08T15:11:49.358Z","source_updated_at":"2026-10-15T20:11:19.000Z","source_disclosed_at":"2026-10-15T20:11:18.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T23:14:22.124Z"},{"id":"NVI-00011986","kind":"vulnerability","title":"Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9jww-cxg5-rj9m","CVE-2026-84318"],"plain_summary":"GitHub lists this reviewed advisory for github.com/0xJacky/Nginx-UI. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-07dbe4b54c76e64934192b9b56c4c2da"],"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":"2026-10-15T20:11:19.000Z","value":"8.8 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-7b779c8357f5c5369c38ba356cd0ac62"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.816%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.57203. Missing scores are unknown.","source_id":"sr-07dbe4b54c76e64934192b9b56c4c2da"}],"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-7b779c8357f5c5369c38ba356cd0ac62","url":"https://github.com/advisories/GHSA-9jww-cxg5-rj9m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9jww-cxg5-rj9m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"},{"id":"sr-07dbe4b54c76e64934192b9b56c4c2da","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-2026-84318","publisher":"FIRST EPSS","observed_at":"2026-11-04T23:33:33.072Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7b779c8357f5c5369c38ba356cd0ac62"],"technology":"github.com/0xJacky/Nginx-UI","known_exclusions":[],"conditions_summary":"### Summary\n\nThe MCP tool `nginx_config_add` writes nginx configuration files to disk and triggers an nginx reload without calling `config.ValidateConfigFile`. The identical flow in the REST API (`POST /api/configs`) does call that function and correctly rejects dangerous directives. An authenticated attacker can exploit this gap to write config files containing any blocked directive (`perl`, `js_import`, `load_module`, `user root`, etc.), bypassing nginx-ui's entire security layer. On a server with the nginx Perl, njs, or Lua module loaded, this is post-authentication Remote Code Execution.\n\n### Details\n\n`api/config/add.go` (line 46) calls `config.ValidateConfigFile` before writing:\n\n```go\nerr = config.ValidateConfigFile(path, content)  // validates directives, checks blocklist\nif err != nil {\n    cosy.ErrHandler(c, err)\n    return\n}\n```\n\n`mcp/config/config_add.go` (line 79) omits that call entirely and writes directly:\n\n```go\nerr = os.WriteFile(path, []byte(content), 0644)  // no ValidateConfigFile, no blocklist check\n...\nres := nginx.Control(nginx.Reload)               // reload triggered immediately\n```\n\n`config.ValidateConfigFile` runs two checks:\n- **`ValidateConfigContent`**","public_affected_ranges":[">= 1.9.10-0.20250506154222-1330888280a2, < 1.9.10-0.20260703131214-23d1934099b0"]}],"null_published_at":"2026-11-06T07:24:11.282Z","source_updated_at":"2026-10-15T20:11:19.000Z","source_disclosed_at":"2026-10-15T20:11:18.000Z","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":"2026-10-31T23:14:22.124Z"},{"id":"NVI-00011986","kind":"vulnerability","title":"Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9jww-cxg5-rj9m","CVE-2026-84318"],"plain_summary":"GitHub lists this reviewed advisory for github.com/0xJacky/Nginx-UI. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-7b779c8357f5c5369c38ba356cd0ac62"],"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":"2026-10-15T20:11:19.000Z","value":"8.8 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-7b779c8357f5c5369c38ba356cd0ac62"}],"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-7b779c8357f5c5369c38ba356cd0ac62","url":"https://github.com/advisories/GHSA-9jww-cxg5-rj9m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9jww-cxg5-rj9m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7b779c8357f5c5369c38ba356cd0ac62"],"technology":"github.com/0xJacky/Nginx-UI","known_exclusions":[],"conditions_summary":"### Summary\n\nThe MCP tool `nginx_config_add` writes nginx configuration files to disk and triggers an nginx reload without calling `config.ValidateConfigFile`. The identical flow in the REST API (`POST /api/configs`) does call that function and correctly rejects dangerous directives. An authenticated attacker can exploit this gap to write config files containing any blocked directive (`perl`, `js_import`, `load_module`, `user root`, etc.), bypassing nginx-ui's entire security layer. On a server with the nginx Perl, njs, or Lua module loaded, this is post-authentication Remote Code Execution.\n\n### Details\n\n`api/config/add.go` (line 46) calls `config.ValidateConfigFile` before writing:\n\n```go\nerr = config.ValidateConfigFile(path, content)  // validates directives, checks blocklist\nif err != nil {\n    cosy.ErrHandler(c, err)\n    return\n}\n```\n\n`mcp/config/config_add.go` (line 79) omits that call entirely and writes directly:\n\n```go\nerr = os.WriteFile(path, []byte(content), 0644)  // no ValidateConfigFile, no blocklist check\n...\nres := nginx.Control(nginx.Reload)               // reload triggered immediately\n```\n\n`config.ValidateConfigFile` runs two checks:\n- **`ValidateConfigContent`**","public_affected_ranges":[">= 1.9.10-0.20250506154222-1330888280a2, < 1.9.10-0.20260703131214-23d1934099b0"]}],"null_published_at":"2026-11-01T01:03:56.619Z","source_updated_at":"2026-10-15T20:11:19.000Z","source_disclosed_at":"2026-10-15T20:11:18.000Z","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":"2026-10-31T23:14:22.124Z"}],"next_cursor":null,"snapshot_revision":"42594"}