# CVE-2026-81940: IBM Langflow OSS code injection in flow display names

Source: https://junglewise.ai/threats/cve-2026-81940-ibm-langflow-oss-code-injection-in-flow-display-names  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-81940 · Severity: high · CVSS 8.8 · Published 2026-09-10

IBM Langflow is an open-source platform for building and deploying AI workflows. This vulnerability allows authenticated users to inject malicious code through flow display names, enabling arbitrary code execution on the server. An attacker with valid credentials could manipulate the application logic or data, potentially compromising sensitive information or disrupting service availability.

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-2026-81940 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81940 being exploited in the wild.

**How severe is CVE-2026-81940?** High severity, with a CVSS score of 8.8, published 10 September 2026.

**Which products and versions are affected?** IBM Langflow OSS 1.0.0 through 1.11.5.

**Is there a fix for CVE-2026-81940?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-81940 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-81940?** 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 a code injection flaw (CWE-94) in IBM Langflow OSS versions 1.0.0 through 1.11.5, caused by improper neutralization of special characters in flow display names. An authenticated attacker can craft malicious input in the display name field that is not properly sanitized before being processed by the application logic. The attack requires valid user credentials (authentication required) and network access to the Langflow instance. Successful exploitation allows arbitrary code execution in the context of the application, potentially leading to data theft, system compromise, or denial of service. IBM has released patches to address this and related code execution vulnerabilities in Langflow.

## Affected products

- IBM Langflow OSS 1.0.0 through 1.11.5

## Timeline

- 2026-09-10: disclosed

## References

- [https://www.ibm.com/support/pages/node/7286666](https://www.ibm.com/support/pages/node/7286666)

## 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)