Security Vulnerabilities
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.
CVSS Score
7.7
EPSS Score
0.004
Published
2026-09-04
IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information due to improper validation of symbolic links.
CVSS Score
6.5
EPSS Score
0.005
Published
2026-09-04
IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information due to path traversal.
CVSS Score
6.5
EPSS Score
0.005
Published
2026-09-04
IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote attacker to obtain sensitive information due to incomplete scrubbing of sensitive credential fields.
CVSS Score
7.5
EPSS Score
0.004
Published
2026-09-04
IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information due to server-side request forgery.
CVSS Score
5.0
EPSS Score
0.003
Published
2026-09-04
IBM i 7.6, and 7.5 could allow a local authenticated attacker to obtain information from a privileged file when using SSH.
CVSS Score
3.3
EPSS Score
0.001
Published
2026-09-04
IBM i 7.6, 7.5, 7.4, and 7.3 could allow an authenticated attacker to obtain sensitive information in PASE. An attacker could exploit this vulnerability to access information about process they shouldn't be permitted to access.
CVSS Score
6.5
EPSS Score
0.003
Published
2026-09-04
IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to execute arbitrary code due to an authorization bypass in the flow build process.
CVSS Score
8.8
EPSS Score
0.005
Published
2026-09-04
IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a local attacker to obtain information due to a race condition involving a predictable Unix domain socket path in a world-writable directory.
CVSS Score
4.4
EPSS Score
0.001
Published
2026-09-04
IBM Langflow OSS 1.0.0 through 1.11.2 Langflow could allow an authenticated attacker to write arbitrary files to the server due to improper input validation in the SaveToFileComponent. The application constructs local file paths using attacker‑controlled input without sufficient sanitization when handling requests to the /api/v1/run/{flow_id} endpoint. An attacker with low‑privileged authenticated access (such as a valid API key or user session) can supply crafted path values, including absolute paths or path traversal sequences, allowing arbitrary file writes to locations writable by the Langflow process. Successful exploitation may lead to unauthorized file creation or modification, potentially resulting in further compromise depending on the deployment environment.
CVSS Score
6.5
EPSS Score
0.003
Published
2026-09-04