What is the CVSS score of CVE-2026-8481?

CVE-2026-8481 has a CVSS 3.1 base score of 9.9 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.4%.

Langflow Oss CVE-2026-8481

EUVD-2026-45275 CRITICAL

Code Injection (CWE-94)

2026-07-17 ibm

GHSA-6jrp-2cpp-fpm4

RCE Python IBM Code Injection Langflow Oss

9.9

CVSS 3.1 · Vendor: ibm

View

Vulnerability Assessment

Weakness

CWE

CWE-94

OWASP Top 10:2025

A05:2025 - Injection

ASVS 5.0

V1 - Encoding and Sanitization Code injection prevention, sandbox exec

MITRE ATT&CK

2 techniques across 2 tactics: Execution, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 17, 2026

Authenticated remote code execution in IBM Langflow OSS 1.0.0 through 1.10.0 lets any logged-in user run arbitrary Python — and therefore arbitrary OS commands — with the privileges of the Langflow server process. The flaw is a design failure in the POST /api/v1/validate/code endpoint, which passes user-supplied code straight into Python's exec() with no sandbox, validation, or privilege drop. Rated CVSS 9.9 by IBM; no public exploit identified at time of analysis, though the trivial exec()-based trigger makes exploitation straightforward once authenticated.

Affected VersionsENISA

Langflow OSS 1.0.0 ≤1.10.0

Affected Packages

euvd langflow_oss no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (ibm) PRIMARY 9.9 CRITICAL

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

Primary rating from Vendor (ibm) · only source for this CVE.

CVSS VectorVendor: ibm

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

IBM Langflow OSS 1.0.0 through 1.10.0 contain a critical remote code execution vulnerability in the code validation API endpoint. The POST /api/v1/validate/code endpoint accepts user-supplied Python code and executes it directly using Python's built-in exec() function without sandboxing, input validation, or privilege restrictions, enabling any authenticated user to execute arbitrary system commands with the full privileges of the Langflow server process.

Articles & Coverage 1

News Critical RCE in IBM Langflow OSS 1.0.0-1.10.0 via Code Validation - CVE-2026-8481 Jul 18, 2026

Executive ViewAI

Why It Matters

IBM Langflow OSS versions 1.0.0-1.10.0 contain a critical remote code execution vulnerability (CVE-2026-8481, CVSS 9.9) allowing any authenticated user to execute arbitrary code on the server infrastructure. No public exploit is currently identified; however, the technical simplicity of the vulnerability makes exploitation trivial for any attacker with valid credentials, creating immediate risk of infrastructure compromise.

Recommended Action

Within 24 hours, identify all IBM Langflow OSS deployments and determine which versions are running to establish your exposure scope. Within 7 days, apply the available vendor patch to all affected instances (versions 1.0.0-1.10.0) per IBM's advisory, prioritizing production environments and verifying successful remediation. Within 30 days, audit authentication logs for potential exploitation activity, restrict Langflow access to authorized personnel only, and establish network segmentation to limit lateral movement from compromised systems.

Business Impact: Severe

Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score

0.4%

Top 64% exploitable

Social Media

Sightings

Data Quality

6 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS

Vulnrichment CIRCL

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.4%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision

Scheduled

Exploitation

None

System Exposure· derived

Open

Automatable

Human Impact

Very High

Technical Impact

Total

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +50

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Code Injection CRITICAL

Code injection occurs when an application accepts user input and passes it directly into a language interpreter or evaluator without proper sanitization.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.