CVE-2026-10134 Unauthenticated Server-Side RCE via PythonCodeStructuredTool in Public Flows

What is CVE-2026-10134?

CVE-2026-10134 is a critical code injection vulnerability in Langflow Langflow, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read and modify every flow, conversation, message, file upload, and saved component in the Langflow database, can connect to internal services, abuse cloud metadata endpoints, laterally move to other tenants on the same Langflow instance, and Establish persistence by modifying the public flow's `tool_code` so normal `/api/v1/build/...` calls by any user re-execute attacker code at each build.

Weakness: CWE-94

Which versions are affected by CVE-2026-10134?

It affects 1 product.

Products include Langflow Langflow.

How do I fix CVE-2026-10134?

No fix has been published for CVE-2026-10134 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-10134 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10134 exists.

Public exploit code: 1 Metasploit module and 1 proofs of concept on GitHub.

Other vulnerabilities in Langflow Langflow

• CVE-2026-9198 IBM Langflow Code Injection Exploited Critical 9.8
• CVE-2026-0770 Langflow Inclusion of Functionality from Untrusted Control Sphere Exploited Critical 9.8
• CVE-2025-3248 Langflow Missing Authentication Exploited Critical 9.8
• CVE-2025-34291 Langflow Origin Validation Error Exploited Critical 9.4
• CVE-2026-33017 Langflow Code Injection Exploited Critical 9.3

All Langflow Langflow vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-mgqp-4wrr-7886.