CVE-2026-0768 langflow-ai · langflow

Langflow <=1.2.x - Unauthenticated Remote Code Execution via validate_code

Vulnerability at a glance

Severity, exploitation likelihood & attack requirements

CVSS v3.0 severity
9.8Critical
EPSS · exploitation likelihood
7.669% Probability within 30 daysPercentile 94.3 FIRST · 2026-09-16
Known exploitation
Not in KEV CISA KEV catalog Absence does not establish safety
Attack vector
NetworkRemotely reachable
Attack complexity
LowFewer obstacles to exploitation
Privileges required
NoneNo authentication required
User interaction
NoneNo user action needed
Exploit availability & maturity
Not scored Availability not established No explicit exploit maturity assessment View exploit evidence
Already protected by existing Atomicorp rules No new CVE-specific rule required.

Atomicorp ModSecurity protection

Protected by Atomicorp rules

Atomicorp ModSecurity rules block attacks exploiting this vulnerability when blocking is enabled. Keep your rules current.

By targeting underlying attack techniques and CWE weakness classes, existing rules can protect against newly disclosed vulnerabilities. Rule changes are regression-tested against attack and false-positive corpora.

1 rule identified Verified 2026-09-16 View rules & research details →

WAF protection applies to the tested attack paths; it does not change the CVSS or EPSS score. Keep your software patched and your Atomicorp rules current.

CISA SSVC assessment

CISA ADP · Assessed 2026-01-24 · SSVC 2.0.3

Exploitation
None reported
Automatable
Yes
Technical Impact
Total

Stakeholder-Specific Vulnerability Categorization records CISA’s assessment of exploitation, automation, and technical impact. “None reported” reflects the assessment date; it does not establish that no exploit exists. View SSVC source details.

On this page

CVE Details

  • Protection status: Protected by Atomicorp rules · About protection statuses
  • CVE: CVE-2026-0768
  • Name: Langflow <=1.2.x - Unauthenticated Remote Code Execution via validate_code
  • Severity: Critical
  • CVSS: 9.8 (v3.0) (Critical)
  • CVSS version: 3.0
  • CVSS source: zdi CNA
  • CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    • Attack vector: Network
    • Attack complexity: Low
    • Privileges required: None
    • User interaction: None
    • Scope: Unchanged
    • Confidentiality impact: High
    • Integrity impact: High
    • Availability impact: High
  • CWE: CWE-94 — Improper Control of Generation of Code (‘Code Injection’)
  • Related CAPEC attack patterns (via MITRE CWE relationships): CAPEC-242 , CAPEC-35 , CAPEC-77
  • Vendor: langflow-ai
  • Vulnerable products: langflow , langflow
  • CVE published: 2026-01-23
  • CVE last modified: 2026-06-17
  • Affected versions (NVD configurations):
    • langflow: 1.4.2
  • EPSS: 0.0767; 94.3th percentile as of 2026-09-16 (FIRST )
  • Latest Update: 2026-09-16
  • Selected Rule IDs observed: 340095
  • Matching rules: 1; rules with blocking actions: 1
  • Would-block Rule IDs: 340095
  • Request surfaces inspected: JSON request data, Request arguments, SOAP request data
Technical vulnerability details · CVSS assessments, exploit evidence & CPE data

CVSS assessments

CVSS v3.0 · zdi-disclosures@trendmicro.com

  • Base score: 9.8
  • Base severity: CRITICAL
  • Exploitability subscore: 3.9
  • Impact subscore: 5.9
  • Assessment type: Secondary
  • Source identifier: zdi-disclosures@trendmicro.com
  • Full vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    • Attack vector: Network
    • Attack complexity: Low
    • Privileges required: None
    • User interaction: None
    • Scope: Unchanged
    • Confidentiality impact: High
    • Integrity impact: High
    • Availability impact: High
  • Exploit maturity: Not scored

Exploitability and impact subscores describe the vulnerability’s technical characteristics. Exploit maturity describes the reported state of exploitation; these are separate measures.

Assessment source: NVD record · CVE record

CISA SSVC assessments

These are CISA’s published decision points at the assessment time. They are not a complete organization-specific prioritization decision.

  • Provider: CISA ADP
  • Provider identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  • SSVC version: 2.0.3
  • Role: CISA Coordinator
  • Assessment timestamp: 2026-01-24T04:55:30.681699Z
  • Exploitation: none
  • Automatable: yes
  • Technical Impact: total
  • Source: CISA ADP in the CVE record

Vulnerable CPE configurations

  • cpe:2.3:a:langflow:langflow:1.4.2:-:*:*:*:*:*:*
    • NVD match criteria ID: 81AAA7F9-843A-456C-89A1-B99D18AD4328

Vulnerability Description

Langflow code Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of the code parameter provided to the validate endpoint. The issue results from the lack of proper validation of a user-supplied string before using it to execute Python code. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-27322.

  1. Maintain the observed Atomicorp protections. Keep your Atomicorp commercial rules current and confirm that the selected observed rules (340095 ) have not been locally disabled. Atomicorp commercial rules are enabled by default. If you use Atomic WAF, review the applicable policy and rule settings.

  2. Apply the vendor’s remediation. WAF protection is defense in depth and does not replace upgrading or following the affected vendor’s guidance.

    • Affected versions: Langflow version 1.4.2.
    • No specific CNA/vendor solution or workaround is included in the current CVE Record . Review the vendor’s security advisories and supported-release guidance before making changes.

  3. Validate after changes. Confirm rule updates are current, review WAF events for the affected application, and test application behavior after vendor upgrades, mitigations, or local policy changes.

Research Notes

Atomicorp WAF protections are designed around attack techniques and exploit behaviors, allowing existing protections to apply across multiple vulnerabilities without requiring a unique rule for every CVE.

Public Vulnerability References

Test or Research Source

Research Note Context

This research note documents exploit-technique analysis associated with this vulnerability and references Atomicorp WAF protections observed during engineering review, testing, or validation activities.

Atomicorp security controls are generally designed to identify and mitigate attack techniques and exploit behaviors rather than individual CVE identifiers. As a result, protections developed for one vulnerability may also apply to related attack variants and future vulnerabilities using similar techniques.

Learn More

Atomicorp develops commercially supported security technologies for web applications, servers, endpoints, workloads, and legacy enterprise platforms.

Organizations interested in protecting systems against exploit techniques associated with vulnerabilities such as this one can learn more about:

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For additional information, product evaluations, or technical discussions, visit https://www.atomicorp.com/ or https://modsecurity.io/ .