{"answers":{"affected":"2 open source packages ship an affected version, including signalk-server. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34083 exists.","fix":"Upgrade signalk-server to 2.24.0 or later.","what":"CVE-2026-34083 is a medium-severity vulnerability in signalk-server, published on 2 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-2026-34083 and fix it if it is affected.\n\nWhat it is: CVE-2026-34083 is a medium-severity vulnerability in signalk-server, published on 2 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-2026-34083 exists.\n\nAffected packages and fixed versions:\n- signalk-server (npm): affected from 2.20.0; fixed in 2.24.0\n- signalk-server (npm): affected from 2.20.0; fixed in 2.24.0\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-2026-34083/ (Markdown: https://insights.sbomify.com/CVE-2026-34083/index.md)","id":"CVE-2026-34083","markdown":"https://insights.sbomify.com/CVE-2026-34083/index.md","name":"CVE-2026-34083","record":{"aliases":["GHSA-cxj8-ggf2-p57c"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["account_takeover","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Signal K Server","requires_auth":"none","summary":"Attackers can steal OAuth authorization codes by spoofing the Host header, leading to session hijacking in Signal K Server deployments.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"signal_k_server","vendor":"signalk"}],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"},{"id":"CWE-346","name":"Origin Validation Error"}],"description":"Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0, SignalK Server contains a code-level vulnerability in its OIDC login and logout handlers where the unvalidated HTTP Host header is used to construct the OAuth2 redirect_uri. Because the redirectUri configuration is silently unset by default, an attacker can spoof the Host header to steal OAuth authorization codes and hijack user sessions in realistic deployments as The OIDC provider will then send the authorization code to whatever domain was injected. This issue has been patched in version 2.24.0.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"signalk-server: OAuth Authorization Code Theft via Unvalidated Host Header in OIDC Flow","id":"CVE-2026-34083","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"open_redirect","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::load","id":"CVE-2026-34084"},"packages":[{"ecosystem":"npm","fixed":["2.24.0"],"introduced":["2.20.0"],"last_affected":[],"package":"signalk-server","purl":null,"source":"GHSA-cxj8-ggf2-p57c"},{"ecosystem":"npm","fixed":["2.24.0"],"introduced":["2.20.0"],"last_affected":[],"package":"signalk-server","purl":"pkg:npm/signalk-server","source":"GHSA-cxj8-ggf2-p57c"}],"prev":{"headline":"Dify has IDOR in deleting someone else's chat conversation","id":"CVE-2026-34082"},"products":["signalk-server"],"published":"2026-04-02","related":[{"cvss_score":10,"headline":"RCE - Command Injection in Signal K set-system-time plugin","id":"CVE-2026-23515","kev_date_added":null,"published":"2026-02-02"},{"cvss_score":9.7,"headline":"Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)","id":"CVE-2025-66398","kev_date_added":null,"published":"2026-01-01"},{"cvss_score":9.4,"headline":"signalk-server: Privilege Escalation by Admin Role Injection via /enableSecurity","id":"CVE-2026-33950","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":9.1,"headline":"Signal K Server vulnerable to JWT Token Theft via WebSocket Enumeration and Unauthenticated Polling","id":"CVE-2025-68620","kev_date_added":null,"published":"2026-01-01"},{"cvss_score":8.7,"headline":"Signal K Server's WebSocket Login Endpoint Lacks Rate Limiting (Credential Brute-Force)","id":"CVE-2026-41893","kev_date_added":null,"published":"2026-05-09"},{"cvss_score":7.5,"headline":"Signal K Server has an Unauthenticated Regular Expression Denial of Service (ReDoS) via WebSocket Subscription Paths","id":"CVE-2026-39320","kev_date_added":null,"published":"2026-04-21"},{"cvss_score":7.5,"headline":"Signal K Server Vulnerable to Denial of Service via Unrestricted Access Request Flooding","id":"CVE-2025-68272","kev_date_added":null,"published":"2026-01-01"}],"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":"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":"2026-04-02","vendors":["SignalK"]},"summary":"Attackers can steal OAuth authorization codes by spoofing the Host header, leading to session hijacking in Signal K Server deployments.","url":"https://insights.sbomify.com/CVE-2026-34083/"}