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CVE-2026-33873

Langflow has Authenticated Code Execution in Agentic Assistant Validation

Published: Mar 27, 2026Updated: Apr 3, 2026 Sources: CVE List NVDCWE-94
NVD MITRE
9.9CVSSCRITICAL
EPSS Score
1.4%
Top 30.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

Description

Langflow 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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-94

Affected Products

langflowlangflow
SaaS
AI / ML / ai-agent-tooling
langflowlangflow-ai
SaaS
AI / ML
langflowcommercialAI / MLaka langflow-base, langflow desktop, langflow
langflow-aicommercialAI / ML

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfbcd1fc/src/backend/base/langflow/agentic/api/router.py#L252-L297
github.com
https://github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfbcd1fc/src/backend/base/langflow/agentic/api/schemas.py#L20-L31
github.com
https://github.com/langflow-ai/langflow/blob/f7f4d1e70ba5eecd18162ec96f3571c2cfbcd1fc/src/backend/base/langflow/agentic/helpers/code_extraction.py#L11-L53
github.com
and 13 more references View all →

Timeline

Published
Mar 27, 2026
Last Updated
Apr 3, 2026

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