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IBM Langflow OSS CVE-2026-78569

| EUVDEUVD-2026-75800 HIGH
OS Command Injection (CWE-78)
2026-09-10 ibm GHSA-q4m2-w5fx-64v5
RCE Command Injection IBM Langflow Oss
8.8
CVSS 3.1 · Vendor: ibm
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Severity by source

Vendor (ibm) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.8 HIGH

Network-reachable API, low-complexity denylist bypass; PR:L required since authentication gates all exploitation; full CIA impact from arbitrary OS command execution.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (ibm).

CVSS VectorVendor: ibm

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 10, 2026 - 22:17 vuln.today
CVE Published
Sep 10, 2026 - 21:43 cve.org
HIGH 8.8

DescriptionCVE.org

IBM Langflow OSS 1.0.0 through 1.11.5 could allow an authenticated attacker to execute arbitrary code due to an incomplete denylist in the security scanner.

AnalysisAI

Authenticated remote code execution in IBM Langflow OSS 1.0.0 through 1.11.5 allows a low-privilege attacker to execute arbitrary OS commands by submitting crafted input that bypasses the platform's security scanner denylist. The root cause is an incomplete denylist (CWE-78) in the scanner responsible for gatekeeping executable content within AI workflow components - meaning certain command injection payloads are not intercepted and reach the underlying OS. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid authenticated session with at least low-privilege access to the IBM Langflow OSS instance (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects the severity for affected deployments: network-reachable, low complexity, no user interaction, full CIA impact, but gated on authenticated low-privilege access. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Patch available per IBM vendor advisory (https://www.ibm.com/support/pages/node/7286666); upgrade beyond the affected range of 1.0.0-1.11.5 per IBM's guidance, as the exact fixed release version is not independently confirmed in available data. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all Langflow deployments and identify instances running versions 1.0.0 through 1.11.5. …

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CVE-2026-78569 vulnerability details – vuln.today
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