Cyber Resilience

CVE-2026-10140

Critical

Published: 30 June 2026

Published
30 June 2026
Modified
02 July 2026
KEV Added
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Patch
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CVSS Score v3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
EPSS Score 0.0020 10.1th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-10140 is a critical-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Langflow Langflow. Its CVSS base score is 9.6 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 10.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability details

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…

more

API credentials, leading to cross-tenant billing and accountability misattribution.

CWE(s)
CWE-639

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Direct exploitation of public-facing multi-tenant application via authorization bypass (CWE-639) enabling cross-tenant credential misuse.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-38530Shared CWE-639
CVE-2023-38965Shared CWE-639
CVE-2026-25929Shared CWE-639
CVE-2025-34140Shared CWE-639
CVE-2023-35914Shared CWE-639
CVE-2026-29200Shared CWE-639
CVE-2024-12335Shared CWE-639
CVE-2026-48872Shared CWE-639
CVE-2024-8261Shared CWE-639
CVE-2025-49978Shared CWE-639

Affected Assets

langflow
langflow
1.0.0 — 1.10.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References