{"answers":{"affected":"3 open source packages ship an affected version, including langflow. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42048 exists.","fix":"Upgrade langflow to 1.9.0 or later.","what":"CVE-2026-42048 is a critical path traversal vulnerability in Langflow Langflow, published on 12 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-42048 and fix it if it is affected.\n\nWhat it is: CVE-2026-42048 is a critical path traversal vulnerability in Langflow Langflow, published on 12 May 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-2026-42048 exists.\n\nAffected packages and fixed versions:\n- langflow (PyPI): affected all versions; fixed in 1.9.0\n- langflow (PyPI): affected all versions; fixed in 1.9.0\n- langflow (PyPI): affected all versions; fixed in 1.9.0\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-2026-42048/ (Markdown: https://insights.sbomify.com/CVE-2026-42048/index.md)","id":"CVE-2026-42048","markdown":"https://insights.sbomify.com/CVE-2026-42048/index.md","name":"CVE-2026-42048","record":{"aliases":["GHSA-9whx-c884-c68q","PYSEC-2026-377"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"AI workflow tool","requires_auth":"low_privilege","summary":"An authenticated attacker can delete arbitrary directories on the server via path traversal in the Knowledge Bases API, causing data loss and service disruption.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"langflow","vendor":"langflow"}],"cvss":{"score":9.6,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow is vulnerable to Path Traversal in the Knowledge Bases API (DELETE /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are concatenated directly into file paths without proper sanitization or boundary validation. An authenticated attacker can exploit this flaw to delete arbitrary directories anywhere on the server's filesystem, leading to data loss and potential service disruption. This vulnerability is fixed in 1.9.0.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":"2026-05-21","github_poc":1,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-05-21T09:26:43Z","kind":"github_poc","ref":"https://github.com/EQSTLab/CVE-2026-42048","stars":2,"title":"Langflow Arbitrary Directory Deletion"}],"tier":"weaponised"},"has_fix":true,"headline":"Langflow: Path Traversal in Langflow Knowledge Bases API","id":"CVE-2026-42048","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"langflow:langflow","products":["langflow:langflow"],"type":"path_traversal","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"jadx: RCE Via Groovy Code Injection in Gradle Export","id":"CVE-2026-42049"},"packages":[{"ecosystem":"PyPI","fixed":["1.9.0"],"introduced":["0"],"last_affected":[],"package":"langflow","purl":null,"source":"GHSA-9whx-c884-c68q"},{"ecosystem":"PyPI","fixed":["1.9.0"],"introduced":["0"],"last_affected":[],"package":"langflow","purl":"pkg:pypi/langflow","source":"GHSA-9whx-c884-c68q"},{"ecosystem":"PyPI","fixed":["1.9.0"],"introduced":["0"],"last_affected":[],"package":"langflow","purl":"pkg:pypi/langflow","source":"PYSEC-2026-377"}],"prev":{"headline":"Inngest TypeScript SDK exposes environment variables via serve() handler on unhandled HTTP methods","id":"CVE-2026-42047"},"products":["langflow"],"published":"2026-05-12","related":[{"cvss_score":9.8,"headline":"IBM Langflow Code Injection","id":"CVE-2026-9198","kev_date_added":"2026-08-04","published":"2026-07-17"},{"cvss_score":9.8,"headline":"Langflow Inclusion of Functionality from Untrusted Control Sphere","id":"CVE-2026-0770","kev_date_added":"2026-07-21","published":"2026-01-23"},{"cvss_score":9.8,"headline":"Langflow Missing Authentication","id":"CVE-2025-3248","kev_date_added":"2025-05-05","published":"2025-04-07"},{"cvss_score":9.4,"headline":"Langflow Origin Validation Error","id":"CVE-2025-34291","kev_date_added":"2026-05-21","published":"2025-12-05"},{"cvss_score":9.3,"headline":"Langflow Code Injection","id":"CVE-2026-33017","kev_date_added":"2026-03-25","published":"2026-03-20"},{"cvss_score":8.4,"headline":"Langflow Authorization Bypass Through User-Controlled Key","id":"CVE-2026-55255","kev_date_added":"2026-07-07","published":"2026-06-23"},{"cvss_score":10,"headline":"Unauthenticated Server-Side RCE via PythonCodeStructuredTool in Public Flows","id":"CVE-2026-10134","kev_date_added":null,"published":"2026-06-30"}],"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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-13","vendors":["langflow-ai"]},"summary":"An authenticated attacker can delete arbitrary directories on the server via path traversal in the Knowledge Bases API, causing data loss and service disruption.","url":"https://insights.sbomify.com/CVE-2026-42048/"}