CVE-2026-10140Network attack vector

Cross-tenant billing abuse via user-agnostic client caches

Published Jun 30, 2026 · Updated Jun 30, 2026

Authorization bypass in IBM Langflow OSS 1.0.0 through 1.10.0 allows remote authenticated users to misattribute voice API usage. The ElevenLabsClientManager caches the first user's API key in process-global class state, while the OpenAI TTS cache indexes clients only by a user-controlled session ID instead of user identity. Exploitation requires network access, multiple accounts, and another user's configured provider key; normal victim voice use is billed or attributed to the wrong upstream account.

CVSS severity9.6
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in IBM Langflow OSS 1.0.0 through 1.10.0 allows remote authenticated users to misattribute voice API usage. The ElevenLabsClientManager caches the first user's API key in process-global class state, while the OpenAI TTS cache indexes clients only by a user-controlled session ID instead of user identity. Exploitation requires network access, multiple accounts, and another user's configured provider key; normal victim voice use is billed or attributed to the wrong upstream account.

The record

CVE
CVE-2026-10140
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
OpenBMC Project
Product
Langflow OSS
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <=1.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenBMC Project · Langflow OSSversion=1.0.0 <=1.10.0

Published CVSS scores

9.6IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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