What is the CVSS score of CVE-2026-7528?

CVE-2026-7528 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Langflow OSS are affected by CVE-2026-7528?

IBM Langflow OSS versions 1.0.0-1.9.0 contain a denial-of-service vulnerability accessible to authenticated users; no public exploit has been identified at time of analysis.

How to fix or mitigate CVE-2026-7528?

Within 24 hours: Conduct comprehensive asset inventory to identify all IBM Langflow deployments and confirm which systems run versions 1.0.0-1.9.0. Within 7 days: Deploy compensating controls including network access restrictions, API rate limiting, resource quotas, and enhanced authentication monitoring; establish alerting for abnormal resource consumption. Within 30 days: Execute upgrade plan to IBM Langflow 1.10.0 or later once vendor releases patched version; maintain interim controls until upgrade is complete.

Langflow OSS CVE-2026-7528

EUVD-2026-32495 HIGH

Uncontrolled Resource Consumption (CWE-400)

2026-05-27 psirt@us.ibm.com

GHSA-vppx-25hc-f892

Denial Of Service IBM Langflow

7.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.1 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

May 27, 2026 - 20:14 vuln.today

DescriptionCVE.org

IBM Langflow OSS 1.0.0 through 1.9.0 could allow a denial of service due to uncontrolled resource consumption.

AnalysisAI

Denial of service in IBM Langflow OSS 1.0.0 through 1.9.0 lets a low-privileged, authenticated remote attacker drive uncontrolled resource consumption (CWE-400) to degrade or crash the service, with a high availability impact and a minor confidentiality exposure per the CVSS vector. The flaw is network-reachable, requires no user interaction, and needs only a low-privilege account. There is no public exploit identified at time of analysis, it is not listed in CISA KEV, and no EPSS score was supplied.

Technical ContextAI

Langflow is an open-source, Python-based low-code/visual framework for building LLM- and agent-driven applications, exposing a web API and UI for composing and running flows. The root cause is classified as CWE-400 (Uncontrolled Resource Consumption), a class of bug where the application fails to bound the CPU, memory, threads, connections, or other resources consumed in response to attacker-influenced input or requests, allowing a relatively small amount of effort to exhaust available capacity. The advisory does not name the specific endpoint, flow operation, or parser at fault, and no CPE strings were provided to pin the exact build, so the precise resource-exhaustion sink is not confirmed from the available data.

RemediationAI

No exact fixed version is stated in the provided data, so consult the IBM security bulletin at https://www.ibm.com/support/pages/node/7273427 for the vendor-released patched build and upgrade beyond 1.9.0 once confirmed (treat the bulletin as 'patch available per vendor advisory'; the specific fix version is not independently confirmed here). As compensating controls until patched: restrict network access to the Langflow API/UI to trusted networks or place it behind a VPN/reverse proxy, since the vector is AV:N; enforce per-account rate limiting and request size/timeout limits at the proxy to blunt resource exhaustion (trade-off: may throttle legitimate heavy flows); apply OS- or container-level resource quotas (CPU/memory cgroups, restart-on-OOM) to contain impact and recover automatically (trade-off: a crash-loop still interrupts service); and tighten account provisioning so low-privilege accounts are not handed to untrusted users, given the PR:L requirement.