{"id":"CVE-2026-51888","title":"langflow-ai langflow v1.8.4 is affected by: Directory Traversal","summary":"langflow-ai langflow v1.8.4 is affected by: Directory Traversal. The impact is: Arbitrary file write outside the intended workspace or storage boundary.. The component is: src/backend/base/langflow/api/v1/knowledge_bases.py:knowledge_bas…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-22"],"published":"2026-10-01","updated":"2026-10-06","sourceUpdated":"2026-10-06T15:17:18.300","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-51888","references":[{"url":"https://gist.github.com/Ro1ME/c85f513d1fd702c686cffe061cbf8ef5","label":"cve@mitre.org"},{"url":"https://gist.github.com/Ro1ME/c85f513d1fd702c686cffe061cbf8ef5","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00635,"epssPercentile":0.50204,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-06T14:20:05.906552Z"},"ingestedAt":"2026-10-01T23:03:32.776Z","slug":"CVE-2026-51888","body":"## Overview\n\nlangflow-ai langflow v1.8.4 is affected by: Directory Traversal. The impact is: Arbitrary file write outside the intended workspace or storage boundary.. The component is: src/backend/base/langflow/api/v1/knowledge_bases.py:knowledge_bases-create_knowledge_base-a-live-http-post-to-create-knowledge-base. The attack vector is: Attack surface: HTTP or browser-backed service path. A public-facing upload or HTTP route handler forwards an attacker-controlled path or filename into host file creation without any visible boundary enforcement. ¶¶ A weakness has been identified in langflow-ai langflow up to 1.8.4. langflow contains an absolute path traversal vulnerability in knowledge_bases-create_knowledge_base-a-live-http-post-to-create-knowledge-base (src/backend/base/langflow/api/v1/knowledge_bases.py:51). An attacker can write or overwrite files outside the intended working directory by providing absolute paths in the knowledge base creation endpoint.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":216507,"id":"CVE-2026-51888","ts":1791299024518,"field":"exploit_available","old":"false","new":"true"},{"seq":216506,"id":"CVE-2026-51888","ts":1791299024518,"field":"cvss","old":null,"new":"7.5"},{"seq":216505,"id":"CVE-2026-51888","ts":1791299024518,"field":"severity","old":"none","new":"high"}]}