{"answers":{"affected":"3 open source packages ship an affected version, including github.com/0xJacky/Nginx-UI.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84318 exists.","fix":"Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260703131214-23d1934099b0 or later.","what":"CVE-2026-84318 is a high-severity missing authorization vulnerability in 0xJacky nginx-ui, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-84318 and fix it if it is affected.\n\nWhat it is: CVE-2026-84318 is a high-severity missing authorization vulnerability in 0xJacky nginx-ui, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84318 exists.\n\nAffected packages and fixed versions:\n- github.com/0xJacky/Nginx-UI (Go): affected from 1.9.10-0.20250506154222-1330888280a2; fixed in 1.9.10-0.20260703131214-23d1934099b0\n- github.com/0xJacky/Nginx-UI (Go): affected from 1.9.10-0.20250506154222-1330888280a2; fixed in 1.9.10-0.20260703131214-23d1934099b0\n- github.com/0xJacky/Nginx-UI (Go): affected from 1.9.10-0.20250506154222-1330888280a2; fixed in 1.9.10-0.20260703131214-23d1934099b0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-84318/ (Markdown: https://insights.sbomify.com/CVE-2026-84318/index.md)","id":"CVE-2026-84318","markdown":"https://insights.sbomify.com/CVE-2026-84318/index.md","name":"CVE-2026-84318","record":{"aliases":["GHSA-9jww-cxg5-rj9m","GO-2026-6781"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Nginx web UI","requires_auth":"low_privilege","summary":"An authenticated attacker can bypass directive validation in the MCP tool to write malicious Nginx configs, leading to remote code execution.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-693","name":"Protection Mechanism Failure"}],"description":"Nginx UI is a web user interface for the Nginx web server. From 2.0.0-rc.6 until 2.4.1, the 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. This issue is fixed in version 2.4.1.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE","id":"CVE-2026-84318","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Nginx UI: MCP configuration tools bypass restricted directive validation and allow secondary authenticated users to execute NJS in Nginx worker context","id":"CVE-2026-84319"},"packages":[{"ecosystem":"Go","fixed":["1.9.10-0.20260703131214-23d1934099b0"],"introduced":["1.9.10-0.20250506154222-1330888280a2"],"last_affected":[],"package":"github.com/0xJacky/Nginx-UI","purl":null,"source":"GHSA-9jww-cxg5-rj9m"},{"ecosystem":"Go","fixed":["1.9.10-0.20260703131214-23d1934099b0"],"introduced":["1.9.10-0.20250506154222-1330888280a2"],"last_affected":[],"package":"github.com/0xJacky/Nginx-UI","purl":"pkg:golang/github.com/0xJacky/Nginx-UI","source":"GHSA-9jww-cxg5-rj9m"},{"ecosystem":"Go","fixed":["1.9.10-0.20260703131214-23d1934099b0"],"introduced":["1.9.10-0.20250506154222-1330888280a2"],"last_affected":[],"package":"github.com/0xJacky/Nginx-UI","purl":"pkg:golang/github.com/0xJacky/Nginx-UI","source":"GO-2026-6781"}],"prev":{"headline":"Nginx UI: MCP nginx_config_add skips config directive validation → authenticated nginx directive injection (RCE on the official image)","id":"CVE-2026-84317"},"products":["nginx-ui"],"published":"2026-10-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-13","vendors":["0xJacky"]},"summary":"An authenticated attacker can bypass directive validation in the MCP tool to write malicious Nginx configs, leading to remote code execution.","url":"https://insights.sbomify.com/CVE-2026-84318/"}