{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-79534 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-79534 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-79534 is a medium-severity path traversal vulnerability in n/a, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-79534 and fix it if it is affected.\n\nWhat it is: CVE-2026-79534 is a medium-severity path traversal vulnerability in n/a, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-79534 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2026-79534/ (Markdown: https://insights.sbomify.com/CVE-2026-79534/index.md)","id":"CVE-2026-79534","markdown":"https://insights.sbomify.com/CVE-2026-79534/index.md","name":"CVE-2026-79534","record":{"aliases":["GHSA-9c87-p3cg-99hj"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_modify","data_read"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"MCP filesystem server","requires_auth":"none","summary":"An attacker can write or read files outside allowed directories by exploiting dangling symlinks in the MCP filesystem server.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"mark3labs mcp-filesystem-server v0.11.1 is vulnerable to Directory Traversal due to an improper link resolution in validatePath (filesystemserver/handler/helper.go). When filepath.EvalSymlinks returns os.IsNotExist for a dangling symlink, the fallback validates only the parent directory and returns the unresolved path, so write_file (and modify_file, copy_file, move_file, create_directory) follows a pre-existing dangling symlink located inside an allowed directory and creates a file outside the configured allowed directories.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Path traversal in n/a","id":"CVE-2026-79534","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Command injection in n/a","id":"CVE-2026-79535"},"packages":[],"prev":{"headline":"Denial of service in n/a","id":"CVE-2026-79522"},"products":["n/a"],"published":"2026-09-29","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-30","vendors":["n/a"]},"summary":"An attacker can write or read files outside allowed directories by exploiting dangling symlinks in the MCP filesystem server.","url":"https://insights.sbomify.com/CVE-2026-79534/"}