CVE-2026-10140 Cross-Tenant API Key Reuse and Billing Fraud in Langflow Voice Mode Subsystem

What is CVE-2026-10140?

CVE-2026-10140 is a critical vulnerability in Langflow Langflow, published on 30 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM Langflow OSS 1.0.0 through 1.10.0 voice mode contains improper shared-state handling that allows reuse of API clients across tenant boundaries. An authenticated attacker can manipulate cache state to cause requests from other users to be processed using incorrect upstream API credentials, leading to cross-tenant billing and accountability misattribution.

Weakness: CWE-639

Which versions are affected by CVE-2026-10140?

It affects 1 product.

Products include Langflow Langflow.

How do I fix CVE-2026-10140?

No fix has been published for CVE-2026-10140 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-10140 being exploited?

There is no known exploitation of CVE-2026-10140 in the wild and no public exploit code.

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-p5v5-v74q-w38h.