CVE-2026-19306

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-81163 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')… CWE-22
• CVE-2026-112049 Vita3K before build 4187 contains a path traversal (zip slip) vulnerability in… CWE-22
• CVE-2026-112005 WhoDB 0.104.0 before 0.135.0 contains a path traversal vulnerability that allows remote… CWE-22
• CVE-2026-61702 OpenPrinting CUPS is an open source printing system for Linux and other Unix-like… CWE-22
• CVE-2026-104871 The Angular SSR is a server-rise rendering tool for Angular applications. CWE-22
• CVE-2026-102991 Mako is a template library written in Python. CWE-22
• CVE-2026-101894 The decompress package for Node.js extracts archives. CWE-22
• CVE-2026-100689 GitPython before 3.1.62 does not validate the `path` field read from an untrusted… CWE-22