CVE-2026-19306

Published Sep 4, 2026

Last updated 2 days ago

Overview

Description
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.
Source
psirt@us.ibm.com
NVD status
Analyzed
Products
langflow

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.7
Impact score
4
Exploitability score
3.1
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Severity
HIGH

Weaknesses

psirt@us.ibm.com
CWE-22

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.