{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40518 exists.","fix":"No fix has been published for CVE-2026-40518 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-40518 is a high-severity path traversal vulnerability in bytedance deer-flow, published on 17 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-40518 and fix it if it is affected.\n\nWhat it is: CVE-2026-40518 is a high-severity path traversal vulnerability in bytedance deer-flow, published on 17 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40518 exists.\n\nAffected product: bytedance deer-flow. 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-2026-40518/ (Markdown: https://insights.sbomify.com/CVE-2026-40518/index.md)","id":"CVE-2026-40518","markdown":"https://insights.sbomify.com/CVE-2026-40518/index.md","name":"CVE-2026-40518","record":{"aliases":["GHSA-54pv-34f9-m4mq"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_modify","code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"DeerFlow application","requires_auth":"low_privilege","summary":"Attackers can bypass agent name validation in bootstrap mode to write arbitrary files outside the intended directory, potentially achieving code execution.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"deerflow","vendor":"bytedance"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"ByteDance DeerFlow before commit 2176b2b contains a path traversal and arbitrary file write vulnerability in bootstrap-mode custom-agent creation where the agent name validation is bypassed. Attackers can supply traversal-style values or absolute paths as the agent name to influence directory creation and write files outside the intended custom-agent directory, potentially achieving arbitrary file write on the system subject to filesystem permissions.","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":"ByteDance DeerFlow Path Traversal and Arbitrary File Write via Bootstrap Mode","id":"CVE-2026-40518","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Nginx Proxy Manager Authenticated RCE via setupCertbotPlugins()","id":"CVE-2026-40519"},"packages":[],"prev":{"headline":"radare2 \u003c 6.1.4 Command Injection via PDB Parser Symbol Names","id":"CVE-2026-40517"},"products":["deer-flow"],"published":"2026-04-17","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-08-14","vendors":["bytedance"]},"summary":"Attackers can bypass agent name validation in bootstrap mode to write arbitrary files outside the intended directory, potentially achieving code execution.","url":"https://insights.sbomify.com/CVE-2026-40518/"}