{"answers":{"affected":"3 open source packages ship an affected version, including github.com/0xJacky/Nginx-UI. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34403 exists.","fix":"Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260316053337-1a9cd29a3082 or later.","what":"CVE-2026-34403 is a medium-severity vulnerability in 0xJacky nginx-ui, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-34403 and fix it if it is affected.\n\nWhat it is: CVE-2026-34403 is a medium-severity vulnerability in 0xJacky nginx-ui, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34403 exists.\n\nAffected packages and fixed versions:\n- github.com/0xJacky/Nginx-UI (Go): affected all versions; fixed in 1.9.10-0.20260316053337-1a9cd29a3082\n- github.com/0xJacky/Nginx-UI (Go): affected all versions; fixed in 1.9.10-0.20260316053337-1a9cd29a3082\n- github.com/0xJacky/Nginx-UI (Go): affected all versions; fixed in 1.9.10-0.20260316053337-1a9cd29a3082\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-2026-34403/ (Markdown: https://insights.sbomify.com/CVE-2026-34403/index.md)","id":"CVE-2026-34403","markdown":"https://insights.sbomify.com/CVE-2026-34403/index.md","name":"CVE-2026-34403","record":{"aliases":["GHSA-78mf-482w-62qj","GO-2026-5210"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Nginx web UI","requires_auth":"none","summary":"Attackers can hijack authenticated WebSocket sessions via CSRF, potentially leading to account takeover or code execution on the Nginx UI.","user_interaction":"required","vuln_class":"csrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nginx_ui","vendor":"nginxui"}],"cvss":{"score":5.5,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-1385","name":"Missing Origin Validation in WebSockets"}],"description":"Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.5, all WebSocket endpoints in nginx-ui use a gorilla/websocket Upgrader with CheckOrigin unconditionally returning true, allowing Cross-Site WebSocket Hijacking (CSWSH). Combined with the fact that authentication tokens are stored in browser cookies (set via JavaScript without HttpOnly or explicit SameSite attributes), a malicious webpage can establish authenticated WebSocket connections to the nginx-ui instance when a logged-in administrator visits the attacker-controlled page. Version 2.3.5 patches the issue.","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 vulnerable to Cross-Site WebSocket Hijacking (CSWSH) via missing origin validation on all WebSocket endpoints","id":"CVE-2026-34403","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"csrf","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Nuxt OG Image vulnerable to DoS via image generation","id":"CVE-2026-34404"},"packages":[{"ecosystem":"Go","fixed":["1.9.10-0.20260316053337-1a9cd29a3082"],"introduced":["0"],"last_affected":[],"package":"github.com/0xJacky/Nginx-UI","purl":null,"source":"GHSA-78mf-482w-62qj"},{"ecosystem":"Go","fixed":["1.9.10-0.20260316053337-1a9cd29a3082"],"introduced":["0"],"last_affected":[],"package":"github.com/0xJacky/Nginx-UI","purl":"pkg:golang/github.com/0xJacky/Nginx-UI","source":"GHSA-78mf-482w-62qj"},{"ecosystem":"Go","fixed":["1.9.10-0.20260316053337-1a9cd29a3082"],"introduced":["0"],"last_affected":[],"package":"github.com/0xJacky/Nginx-UI","purl":"pkg:golang/github.com/0xJacky/Nginx-UI","source":"GO-2026-5210"}],"prev":{"headline":"XML Notepad: XML External Entity (XXE) Injection via Unsafe XmlTextReader in XML Diff and Schema Loading","id":"CVE-2026-34401"},"products":["nginx-ui"],"published":"2026-04-20","related":[{"cvss_score":9.8,"headline":"Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover","id":"CVE-2026-33032","kev_date_added":null,"published":"2026-03-30"},{"cvss_score":9.8,"headline":"Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure","id":"CVE-2026-27944","kev_date_added":null,"published":"2026-03-05"},{"cvss_score":9.8,"headline":"Nginx-UI arbitrary file write through the Import Certificate feature","id":"CVE-2024-23827","kev_date_added":null,"published":"2024-01-29"},{"cvss_score":9.4,"headline":"Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite","id":"CVE-2026-107806","kev_date_added":null,"published":"2026-10-09"},{"cvss_score":9.4,"headline":"nginx-ui Backup Restore Allows Tampering with Encrypted Backups","id":"CVE-2026-33026","kev_date_added":null,"published":"2026-03-30"},{"cvss_score":9,"headline":"Unauthenticated Remote Code Execution via Backup Restore in nginx-ui","id":"CVE-2026-42238","kev_date_added":null,"published":"2026-05-04"},{"cvss_score":8.9,"headline":"Unchecked logrotate settings lead to arbitrary command execution","id":"CVE-2024-49368","kev_date_added":null,"published":"2024-10-21"}],"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":"US public information, NVD API terms","name":"NVD"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-04-21","vendors":["0xJacky"]},"summary":"Attackers can hijack authenticated WebSocket sessions via CSRF, potentially leading to account takeover or code execution on the Nginx UI.","url":"https://insights.sbomify.com/CVE-2026-34403/"}