gcdRadar
archive/Patch now/AIR-2026-0222
closedclosed 1 Oct 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-51886: Code injection vulnerability in Langflow

Langflow

Langflow allows authenticated remote code execution through raw Python source code validation without authorization guards. Users are advised to update their deployments.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
8.8
EPSS
0.01 · top 51% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
1 Oct 2026
last update
5 Oct 2026
CVE ids
CVE-2026-51886other records

Timeline · 3

  1. 1 Oct 2026CVE-2026-51886: langflow-ai langflow v1.9.3 is affected by: Code Injection.
  2. 2 Oct 2026GHSA-qqw9-2vj9-hx7r: Duplicate Advisory: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description
  3. 5 Oct 2026CVE-2026-51886: Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description

Sources · 3

Advisories and databases

  1. 2026-10-01
    CVE-2026-51886: langflow-ai langflow v1.9.3 is affected by: Code Injection.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-51886
  2. 2026-10-02
    GHSA-qqw9-2vj9-hx7r: Duplicate Advisory: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description
    GitHub Advisory Database · github.com/advisories/GHSA-qqw9-2vj9-hx7r
  3. 2026-10-05
    CVE-2026-51886: Langflow: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description
    GitHub Advisory Database · github.com/advisories/GHSA-w584-2h2r-2hvf

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
remote-code-executionlangflow
dates
happened 1 Oct 2026 · first reported 1 Oct 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-51886: Code injection vulnerability in Langflow

https://gcdradar.vercel.app/incidents/cve-2026-51886-code-injection-vulnerability-in-langflow · AIR-2026-0222 · closed 2026-10-01

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-01
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-51886
- CVSS: 8.8

## Summary

Langflow allows authenticated remote code execution through raw Python source code validation without authorization guards. Users are advised to update their deployments.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-05: CVE-2026-51886: Langflow: Title Authenticated Remote Code Execution in  validate_code  via Malicious Decorators  Description (https://github.com/advisories/GHSA-w584-2h2r-2hvf)
- 2026-10-02: GHSA-qqw9-2vj9-hx7r: Duplicate Advisory: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description (https://github.com/advisories/GHSA-qqw9-2vj9-hx7r)
- 2026-10-01: CVE-2026-51886: langflow-ai langflow v1.9.3 is affected by: Code Injection. (https://nvd.nist.gov/vuln/detail/CVE-2026-51886)

## Sources

- 2026-10-01 NVD: CVE-2026-51886: langflow-ai langflow v1.9.3 is affected by: Code Injection. https://nvd.nist.gov/vuln/detail/CVE-2026-51886
- 2026-10-02 GitHub Advisory Database: GHSA-qqw9-2vj9-hx7r: Duplicate Advisory: Title Authenticated Remote Code Execution in validate_code via Malicious Decorators Description https://github.com/advisories/GHSA-qqw9-2vj9-hx7r
- 2026-10-05 GitHub Advisory Database: CVE-2026-51886: Langflow: Title Authenticated Remote Code Execution in  validate_code  via Malicious Decorators  Description https://github.com/advisories/GHSA-w584-2h2r-2hvf

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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