Threats Tagged 'cve-2026-19306'

IBM Langflow OSS versions 1.0.0 through 1.11.2 contain a vulnerability that allows an authenticated attacker to read arbitrary files on the server filesystem. This includes sensitive files such as secret keys, JWT signing keys, the application database, and other tenants' upload directories. The vulnerability arises from improper validation of file paths in the files parameter of an authenticated build request, enabling path traversal attacks. The issue bypasses the intended LANGFLOW_RESTRICT_LOCAL_FILE_ACCESS containment mechanism for certain file-reading components. This can lead to confidential data exfiltration via embedding file contents in language model prompts sent to configured model endpoints.

IBM Langflow OSS 1.0.0 through 1.11.2 allows an authenticated attacker to read arbitrary files from the server filesystem — including server secret material (secret_key, JWT signing keys, the application database, /proc/self/environ, and other tenants' upload directories) — by supplying absolute paths or traversal sequences in the files parameter of an authenticated build request. The file contents were embedded as text attachments in the language model prompt and transmitted to the configured model endpoint, resulting in confidential data exfiltration. This bypassed the LANGFLOW_RESTRICT_LOCAL_FILE_ACCESS=true containment boundary, which was enforced for other file-reading components but not for the Chat Input to Message attachment pipeline.