| Component | Langflow |
| Severity | high (CVSS 7.7) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| Published (NVD) | 2026-09-04 |
| Last modified | 2026-09-08 |
| Affected versions | langflow >= 1.0.0, < 1.11.3 |
| Fixed in | 1.11.3 |
| Weakness | CWE-22 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade Langflow to
1.11.3or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
Read more
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