Vulnerability · Published Jun 30, 2026 · Assigned by ibm

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

Critical 9.6

In plain English

A critical-severity authorization bypass via user-controlled key in Langflow OSS from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)0.4%top 71.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
IBM	Langflow OSS	1.0.0 – through 1.10.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

References

https://www.ibm.com/support/pages/node/7278209 vendor-advisory, patch