{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-85661 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-85661 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-85661 is a critical path traversal vulnerability in haris-musa excel-mcp-server, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-85661 and fix it if it is affected.\n\nWhat it is: CVE-2026-85661 is a critical path traversal vulnerability in haris-musa excel-mcp-server, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-85661 in the wild and no public exploit code.\n\nAffected product: haris-musa excel-mcp-server. 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-2026-85661/ (Markdown: https://insights.sbomify.com/CVE-2026-85661/index.md)","id":"CVE-2026-85661","markdown":"https://insights.sbomify.com/CVE-2026-85661/index.md","name":"CVE-2026-85661","record":{"aliases":["GHSA-xv88-r947-5c3v"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"Excel MCP server","requires_auth":"none","summary":"Attackers can read and write arbitrary files by supplying unchecked paths when the server runs in stdio mode without a configured file path.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"excel-mcp-server 0.1.8 fails to enforce path confinement in stdio mode when EXCEL_FILES_PATH is unset, allowing attackers to read and write arbitrary files. Attackers can supply unchecked file paths to read and write tools to access any file accessible to the process.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"excel-mcp-server 0.1.8 Arbitrary File Read/Write via stdio mode","id":"CVE-2026-85661","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Marqo 2.26.0 Server-Side Request Forgery via Media URLs","id":"CVE-2026-85662"},"packages":[],"prev":{"headline":"cli-mcp-server 0.2.5 Command Allowlist Bypass via Shell Substitution","id":"CVE-2026-85660"},"products":["excel-mcp-server"],"published":"2026-09-04","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-14","vendors":["haris-musa"]},"summary":"Attackers can read and write arbitrary files by supplying unchecked paths when the server runs in stdio mode without a configured file path.","url":"https://insights.sbomify.com/CVE-2026-85661/"}