CVE-2026-33017

KEV
Published: Mar 20, 2026 Last Modified: Mar 26, 2026
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
CRITICAL 9,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the POST /api/v1/build_public_tmp/{flow_id}/flow endpoint allows building public flows without requiring authentication. When the optional data parameter is supplied, the endpoint uses attacker-controlled flow data (containing arbitrary Python code in node definitions) instead of the stored flow data from the database. This code is passed to exec() with zero sandboxing, resulting in unauthenticated remote code execution. This is distinct from CVE-2025-3248, which fixed /api/v1/validate/code by adding authentication. The build_public_tmp endpoint is designed to be unauthenticated (for public flows) but incorrectly accepts attacker-supplied flow data containing arbitrary executable code. This issue has been fixed in version 1.9.0.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0036
Percentile
0,6th
Updated

EPSS Score Trend (Last 28 Days)

94

Improper Control of Generation of Code ('Code Injection')

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Integrity Confidentiality Availability Non-Repudiation
Potential Impacts:
Bypass Protection Mechanism Gain Privileges Or Assume Identity Execute Unauthorized Code Or Commands Hide Activities
Applicable Platforms
Languages: Interpreted
Technologies: AI/ML
Likelihood of Exploit: Medium
View CWE Details
95

Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

Incomplete
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Access Control Integrity Availability Other Non-Repudiation
Potential Impacts:
Read Files Or Directories Read Application Data Bypass Protection Mechanism Gain Privileges Or Assume Identity Execute Unauthorized Code Or Commands Hide Activities
Applicable Platforms
Languages: Interpreted, Java, JavaScript, Perl, PHP, Python, Ruby
Technologies: AI/ML
Likelihood of Exploit: Medium
View CWE Details
306

Missing Authentication for Critical Function

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Other
Potential Impacts:
Gain Privileges Or Assume Identity Varies By Context
Applicable Platforms
Technologies: Cloud Computing, ICS/OT
Likelihood of Exploit: High
View CWE Details
Application

Langflow by Langflow

Product Information
Vendor Langflow
Product Langflow
Version Range Affected
To 1.8.2 (exclusive)
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/langflow-ai/langflow/releases/tag/1.8.2
https://github.com/langflow-ai/langflow/releases/tag/1.8.2
https://medium.com/@aviral23/cve-2026-33017-how-i-found-an-…
https://medium.com/@aviral23/cve-2026-33017-how-i-found-an-unauthenticated-rce-…
https://www.cisa.gov/known-exploited-vulnerabilities-catalo…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025…
https://www.cisa.gov/known-exploited-vulnerabilities-catalo…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026…
https://www.sysdig.com/blog/cve-2026-33017-how-attackers-co…
https://www.sysdig.com/blog/cve-2026-33017-how-attackers-compromised-langflow-a…
https://github.com/advisories/GHSA-rvqx-wpfh-mfx7
https://github.com/advisories/GHSA-rvqx-wpfh-mfx7
https://github.com/langflow-ai/langflow/commit/73b6612e3ef2…
https://github.com/langflow-ai/langflow/commit/73b6612e3ef25fdae0a752d75b0fabd4…
https://github.com/langflow-ai/langflow/security/advisories…
https://github.com/langflow-ai/langflow/security/advisories/GHSA-vwmf-pq79-vjvx