IBMCVE-2026-19295
IBM Langflow OSS: privilege escalation
Critical9.9CVE-2026-19295 · Published Aug 28, 2026 · updated Sep 1, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from "authenticated flow user" to arbitrary OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Langflow OSS Product | >= 1.0.0, <= 1.11.1 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-95
More IBM advisories
All IBM| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 28 | IBM Concert: SQL injection | Critical9.1 | No fix yet |
| Aug 28 | IBM Cloud Pak for Data System: denial of service | Medium6.2 | No fix yet |
| Aug 28 | IBM Langflow OSS: path traversal | High7.5 | No fix yet |
| Aug 28 | IBM Langflow OSS: information disclosure | High8.2 | No fix yet |
| Aug 28 | IBM Langflow OSS: remote code execution | Critical9.8 | No fix yet |
| Aug 28 | IBM Langflow OSS: improper authorization | Medium6.4 | No fix yet |