Langflow has Authenticated Code Execution in Agentic Assistant Validation

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-33873
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-27 21:17:23 UTC
Updated2026-03-30 13:26:07 UTC
DescriptionLangflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.9.0, the Agentic Assistant feature in Langflow executes LLM-generated Python code during its validation phase. Although this phase appears intended to validate generated component code, the implementation reaches dynamic execution sinks and instantiates the generated class server-side. In deployments where an attacker can access the Agentic Assistant feature and influence the model output, this can result in arbitrary server-side Python execution. Version 1.9.0 fixes the issue.

Risk And Classification

Primary CVSS: v4.0 9.3 CRITICAL from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.000790000 probability, percentile 0.232870000 (date 2026-04-01)

Problem Types: CWE-94 | CWE-94 CWE-94: Improper Control of Generation of Code ('Code Injection')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary9.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/C...
4.0CNADECLARED9.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Sub Conf.
High
Sub Integrity
High
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Langflow-ai Langflow affected < 1.9.0 Not specified

References

ReferenceSourceLinkTags
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfb... [email protected] github.com
github.com/langflow-ai/langflow/security/advisories/GHSA-v8hw-mh8c-jxfc [email protected] github.com
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