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Vulnerabilities

Vulnerability · CVE-2026-27966

Langflow is a tool for building and deploying AI-powered agents and workflows.

Published Feb 26, 2026 · catalog updated Jun 17, 2026 · Langflow is a tool

Check if you run it

No confirmed exploitation is on record for CVE-2026-27966. EPSS is 2.55%. Act only if a listed version of Langflow is a tool is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Langflow is a tool).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.55%
Remediation
Advisory link
Affected products
cpe langflow/langflow

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes , which automatically exposes LangChain’s Python REPL tool ( ). 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). Version 1.8.0 fixes the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe langflow/langflowversion unspecified

How to fix CVE-2026-27966

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-27966. EPSS is 2.55%. Act only if a listed version of Langflow is a tool is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-94: Code Injection. EPSS 2.55%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 26, 2026 · NIST NVD

    Detected

    Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes , which automatically exposes LangChain’s Python REPL tool ( ). 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). Version 1.8.0 fixes the issue.

  2. Jun 17, 2026 · NIST NVD

    Updated

    Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes , which automatically exposes LangChain’s Python REPL tool ( ). 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). Version 1.8.0 fixes the issue.

Sources

  • CVE.orgVulnerability recordCVE-2026-27966

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-27966

    30-day exploitation probability 2.5%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/langflow_rce_cve_2026_27966

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2026-27966

    Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes , which automatically exposes LangChain’s Python REPL tool ( ). As a result, an attacker can

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.