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Luu, T.J.

CVE-2026-10547: IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id

mediumvulnerability

security

Source: NVD/CVE DatabaseAugust 5, 2026CVE-2026-10547

Summary

IBM Langflow OSS (an open-source workflow tool) versions 1.0.0 through 1.10.3 has a vulnerability where an authenticated user can inject malicious graph data into a shared cache by exploiting improper ownership validation in a deprecated API endpoint. This could allow attackers to corrupt data for other users, run workflows without permission, or crash the system.

Vulnerability Details

CVSS Score

5.9(medium)

EPSS (30-day exploit probability)

EPSS: 0.0%

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

Attack Vector

network

Attack Complexity

high

Privileges Required

low

User Interaction

none

Disclosure Date

August 5, 2026

Classification

Attack SophisticationModerate

Impact (CIA+S)

integrityavailability

AI Component TargetedAPI

Taxonomy References

CWE (Weakness Type)

CWE-284

Affected Vendors

LangChain

Related Issues

medium

CVE-2026-34371: LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the e

Same vendorNVD/CVE Database

critical

CVE-2024-27444: langchain_experimental (aka LangChain Experimental) in LangChain before 0.1.8 allows an attacker to bypass the CVE-2023-

Same vendor

Monthly digest — independent AI security research

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-10547

First tracked: August 5, 2026 at 08:08 PM

Classified by LLM (prompt v3) · confidence: 85%