{"id":"GHSA-vc32-4gwf-77xp","revision":null,"records":[{"revision":"9ee3c4b370c74ac783a6a22f34393c06","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-84360","aliases":[],"title":"Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools","description":"Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the HTTP configuration mutation routes require RequireSecureSession, but /mcp and /mcp_message require only ordinary authentication before exposing nginx_config_add and nginx_config_modify. An OTP-enabled user with a normal JWT but no valid X-Secure-Session-ID can therefore create or modify Nginx configuration and trigger reload behavior through MCP, bypassing the intended step-up control. This issue is fixed in version 2.4.1.","state":0,"publishedAt":"2026-10-12T21:08:04.687+00:00","modifiedAt":"2026-10-13T14:00:35.965+00:00","affected":[{"ecosystem":"Vendor product","name":"nginx-ui","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"0xJacky\",\n                    \"product\": \"nginx-ui\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.4.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-vc32-4gwf-77xp","https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2","https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-84360","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-84360","identifiers":["CVE-2026-84360"]},"retained":false,"historicalAffected":[]},{"revision":"7c25d0aca07a429f8ea80f7fe065b5b2","observedAt":"2026-11-07T15:21:59.153+00:00","statement":{"source":"euvd","id":"EUVD-2026-97907","aliases":["CVE-2026-84360","GHSA-vc32-4gwf-77xp"],"title":"Nginx UI is a web user interface for the Nginx web server. 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This issue is fixed in version 2.4.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":8.1,"severity":null}],"references":["https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-vc32-4gwf-77xp","https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2","https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-97907","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 12, 2026, 9:08:04 PM","dateUpdated":"Oct 13, 2026, 2:00:35 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-97907","identifiers":["EUVD-2026-97907","CVE-2026-84360","GHSA-vc32-4gwf-77xp"]},"retained":false,"historicalAffected":[]},{"revision":"dfbaaf19757643519ed8f7e1a6d0785d","observedAt":"2026-10-25T16:19:16.24+00:00","statement":{"source":"nvd","id":"CVE-2026-84360","aliases":[],"title":"Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the HTTP configuration mutation routes require RequireSecureSession, but /mcp and /mcp_message require only ordinary authentication before exposing nginx_config_add …","description":"Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the HTTP configuration mutation routes require RequireSecureSession, but /mcp and /mcp_message require only ordinary authentication before exposing nginx_config_add and nginx_config_modify. An OTP-enabled user with a normal JWT but no valid X-Secure-Session-ID can therefore create or modify Nginx configuration and trigger reload behavior through MCP, bypassing the intended step-up control. This issue is fixed in version 2.4.1.","state":0,"publishedAt":"2026-10-12T21:17:22.96+00:00","modifiedAt":"2026-10-13T14:31:20.75+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2","https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1","https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-vc32-4gwf-77xp"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84360","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-288"],"productCriteria":[],"sourceDates":{"published":"2026-10-12T21:17:22.960","lastModified":"2026-10-13T14:31:20.750"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-84360","identifiers":["CVE-2026-84360"]},"retained":false,"historicalAffected":[]},{"revision":"f84a87e0a0554d8fa7976db385c3c44e","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-vc32-4gwf-77xp","aliases":["CVE-2026-84360","GO-2026-6799"],"title":"Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools","description":"### Summary\nAn OTP-enabled authenticated user who cannot use the HTTP configuration mutation endpoints without a valid secure session can still mutate Nginx configuration through `/mcp` and `/mcp_message` using only ordinary authentication.\n\n### Details\nThe HTTP configuration mutation surface is explicitly grouped behind `middleware.RequireSecureSession()`. By contrast, the MCP endpoints are exposed with only `middleware.AuthRequired()`. The MCP server exposes configuration mutation tools including `nginx_config_add` and `nginx_config_modify`, so OTP-enabled users gain an alternate path around the intended step-up requirement.\n\nRelevant code paths:\n- [api/config/router.go](/home/kali/Desktop/bounty/nginx-ui/api/config/router.go:14)\n- [internal/middleware/secure_session.go](/home/kali/Desktop/bounty/nginx-ui/internal/middleware/secure_session.go:52)\n- [mcp/router.go](/home/kali/Desktop/bounty/nginx-ui/mcp/router.go:9)\n- [mcp/config/config_add.go](/home/kali/Desktop/bounty/nginx-ui/mcp/config/config_add.go:34)\n- [mcp/config/config_modify.go](/home/kali/Desktop/bounty/nginx-ui/mcp/config/config_modify.go:55)\n\nThis is a security-control bypass rather than a missing feature. The product already established that OTP-enabled users should complete a secure session before high-impact configuration mutations are accepted on the HTTP path.\n\n### PoC\nI verified this locally in an isolated environment with a temporary end-to-end harness that exercised the real `/mcp` and `/mcp_message` routes.\n\nWhat the executed test did:\n1. Created a temporary config directory and configured Nginx control commands to harmless local values (`true`) to avoid touching the host.\n2. Created a real OTP-enabled user in a temporary SQLite database.\n3. Generated a real JWT for that OTP-enabled user.\n4. Started a local test server exposing the real `/mcp` and `/mcp_message` routes.\n5. Opened an authenticated SSE connection to `/mcp` with the JWT and no `X-Secure-Session-ID`.\n6. Initialized the MCP session over `/mcp_message`.\n7. Called the real `nginx_config_add` tool over `/mcp_message`.\n8. Verified that the tool succeeded and created `mcp-bypass.conf` in the managed config directory without any secure-session step-up.\n\nObserved result from the actual local verification:\n- The MCP session initialized successfully without any `X-Secure-Session-ID`.\n- The config file was written through the MCP tool path using only JWT authentication.\n\n### Impact\nOTP-enabled accounts lose the intended step-up protection for high-impact Nginx configuration changes when MCP is enabled. A user who should be blocked until re-authenticating can still create or modify configuration files and trigger reload behavior through MCP.","state":0,"publishedAt":"2026-10-15T20:14:10+00:00","modifiedAt":"2026-10-19T21:41:02.7247757+00:00","affected":[{"ecosystem":"Go","name":"github.com/0xJacky/Nginx-UI","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.9.10-0.20260703131214-23d1934099b0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-vc32-4gwf-77xp","https://nvd.nist.gov/vuln/detail/CVE-2026-84360","https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2","https://github.com/0xJacky/nginx-ui","https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1"],"sourceUrl":"https://github.com/advisories/GHSA-vc32-4gwf-77xp","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-vc32-4gwf-77xp","identifiers":["GHSA-vc32-4gwf-77xp","CVE-2026-84360","GO-2026-6799"]},"retained":false,"historicalAffected":[]},{"revision":"44696262503643948de22d6becb7d7ca","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6799","aliases":["CVE-2026-84360","GHSA-vc32-4gwf-77xp"],"title":"Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools in github.com/0xJacky/Nginx-UI","description":"Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools in github.com/0xJacky/Nginx-UI","state":0,"publishedAt":"2026-10-19T21:08:35+00:00","modifiedAt":"2026-10-19T21:31:53.4170118+00:00","affected":[{"ecosystem":"Go","name":"github.com/0xJacky/Nginx-UI","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.9.10-0.20260703131214-23d1934099b0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-vc32-4gwf-77xp","https://nvd.nist.gov/vuln/detail/CVE-2026-84360","https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2","https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6799","license":"OSV · upstream source license applies","key":"osv:GO-2026-6799","identifiers":["GO-2026-6799","CVE-2026-84360","GHSA-vc32-4gwf-77xp"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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