{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66005 exists.","fix":"No fix has been published for CVE-2026-66005 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-66005 is a medium-severity vulnerability in janhq jan, published on 24 Jul 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-2026-66005 and fix it if it is affected.\n\nWhat it is: CVE-2026-66005 is a medium-severity vulnerability in janhq jan, published on 24 Jul 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-2026-66005 exists.\n\nAffected product: janhq jan. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-66005/ (Markdown: https://insights.sbomify.com/CVE-2026-66005/index.md)","id":"CVE-2026-66005","markdown":"https://insights.sbomify.com/CVE-2026-66005/index.md","name":"CVE-2026-66005","record":{"aliases":["GHSA-4r96-7xrx-4gcr"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Jan local API server","requires_auth":"none","summary":"Network-adjacent attackers can bypass CORS restrictions to access the local API, read data, and invoke tools via DNS rebinding or local network access.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-942","name":"Permissive Cross-domain Security Policy with Untrusted Domains"},{"id":"CWE-183","name":"Permissive List of Allowed Inputs"}],"description":"Jan through 0.8.4, fixed in commit 3e1c1e7, contains a CORS misconfiguration vulnerability in its local API server that allows network-adjacent attackers to bypass trusted host restrictions by exploiting the server's replacement of user-configured trusted hosts with a wildcard that reflects arbitrary origins with credentials. Attackers on the local network or using DNS rebinding can reach the unauthenticated OpenAI-compatible API to perform inference, enumerate models, invoke MCP tools, and read cross-origin responses.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Jan Local API Server CORS Origin Reflection via 0.0.0.0 Binding","id":"CVE-2026-66005","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"lakeFS Unauthenticated Operator Metadata Overwrite via setup_comm_prefs","id":"CVE-2026-66006"},"packages":[],"prev":{"headline":"BlenderMCP Path Traversal via download_polyhaven_asset API","id":"CVE-2026-66004"},"products":["jan"],"published":"2026-07-24","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-09-17","vendors":["janhq"]},"summary":"Network-adjacent attackers can bypass CORS restrictions to access the local API, read data, and invoke tools via DNS rebinding or local network access.","url":"https://insights.sbomify.com/CVE-2026-66005/"}