# CVE-2026-19295: IBM Langflow OSS eval injection in schema creation

Source: https://junglewise.ai/threats/cve-2026-19295-ibm-langflow-oss-eval-injection-in-schema-creation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-19295 · Severity: critical · CVSS 9.9 · Published 2026-08-28

IBM Langflow is a visual workflow automation platform that allows users to build and execute data processing and AI pipelines. An authenticated attacker can execute arbitrary operating system commands on the server by crafting malicious flow configurations, achieving complete system compromise. This bypasses intended security policies designed to prevent custom code execution.

Technologies: [IBM Langflow OSS](https://junglewise.ai/threats/technologies/langflow-oss), [Langflow](https://junglewise.ai/threats/technologies/langflow). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm), [Langflow](https://junglewise.ai/threats/vendors/langflow).

## Quick answers

**Is CVE-2026-19295 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-19295 being exploited in the wild.

**How severe is CVE-2026-19295?** Critical severity, with a CVSS score of 9.9, published 28 August 2026.

**Which products and versions are affected?** IBM Langflow OSS 1.0.0 through 1.11.1.

**Is there a fix for CVE-2026-19295?** A patch was published on 2026-08-28: Fix available in version 1.11.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-19295 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-19295?** Check whether you run IBM Langflow OSS or Langflow at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an eval injection (CWE-95) in the create_input_schema_from_dict function, where attacker-controlled flow template type field strings reach Pydantic's ForwardRef evaluation path. This path internally calls eval() with an unrestricted builtins namespace, allowing arbitrary Python code execution. An authenticated attacker can save a flow with a crafted type field value and trigger a build of a wrapper flow that references it, executing arbitrary OS commands under the server process identity. The attack bypasses the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control. This requires authentication but no user interaction. IBM has released a fix in version 1.11.2.

## Affected products

- IBM Langflow OSS 1.0.0 through 1.11.1

## Timeline

- 2026-08-28: disclosed
- 2026-08-28: patched: Fix available in version 1.11.2

## References

- [https://www.ibm.com/support/pages/node/7284733](https://www.ibm.com/support/pages/node/7284733)

## Related threats

- [IBM Langflow OSS path traversal arbitrary file read and write](https://junglewise.ai/threats/cve-2026-97677-ibm-langflow-oss-1-0-0-through-1-12-2-an-authenticated-flow)
- [IBM Langflow OSS authentication bypass](https://junglewise.ai/threats/cve-2026-93680-ibm-langflow-oss-1-0-0-through-1-12-8-could-allow-a-remote)
- [IBM Langflow OSS denial of service via resource exhaustion](https://junglewise.ai/threats/cve-2026-90991-ibm-langflow-oss-1-0-0-through-1-12-4-could-allow-a-remote)
- [IBM Langflow OSS path traversal arbitrary file overwrite](https://junglewise.ai/threats/cve-2026-77819-ibm-langflow-oss-1-0-0-through-1-12-3-could-allow-a-remote)
- [IBM Langflow OSS improper sanitization of secrets in exports](https://junglewise.ai/threats/cve-2026-77817-ibm-langflow-oss-1-0-0-through-1-12-4-could-allow-a-remote)