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Advisory details: gitlab / pypi/langflow/CVE-2026-27966
Advisory ID gitlab/pypi/langflow/CVE-2026-27966
Aliases CVE-2026-27966
GHSA-3645-fxcv-hqr4
Summary Langflow has Remote Code Execution in CSV Agent The CSV Agent node in Langflow hardcodes `allow_dangerous_code=True`, which automatically exposes LangChain’s Python REPL tool (`python_repl_ast`). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE).
Status Published
Exploitability 2.0
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/langflow/CVE-2026-27966.yml
Reference id Reference type URL
https://github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508
https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-376.yaml
https://pypi.org/project/langflow
CVE-2026-27966 https://nvd.nist.gov/vuln/detail/CVE-2026-27966
GHSA-3645-fxcv-hqr4 https://github.com/advisories/GHSA-3645-fxcv-hqr4
GHSA-3645-fxcv-hqr4 https://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4
Data source Metasploit
Description The CSV Agent node in Langflow hardcodes allow_dangerous_code=True, which automatically exposes LangChain's Python REPL tool (python_repl_ast). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE).
Note 
Stability:
  - crash-safe
SideEffects:
  - artifacts-on-disk
  - ioc-in-logs
Reliability:
  - repeatable-session
Ransomware campaign use Unknown
Source publication date Feb. 25, 2026
Platform Linux,Python,Unix
Source URL https://github.com/rapid7/metasploit-framework/tree/master/modules/exploits/multi/http/langflow_rce_cve_2026_27966.rb

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/langflow/CVE-2026-27966.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.