GHSA-9cc5-j3qq-69gv: Duplicate Advisory Authentication Bypass Vulnerability

CRITICAL
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CVSS 9.8
CWE-306
Published
Advisory Summary

GHSA-9cc5-j3qq-69gv is a CRITICAL (CVSS 9.8) authentication bypass vulnerability (CWE-306: Missing Authentication for Critical Function) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves unauthenticated flow execution via webhook authentication bypass. Remediation is available in the latest vendor maintenance releases.

GHSA-9cc5-j3qq-69gv at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-9cc5-j3qq-69gv
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-306: Missing Authentication for Critical Function
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-9cc5-j3qq-69gv

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

langflow fixed: Latest secure release 
pip install langflow>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show langflow

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-9cc5-j3qq-69gv, inspect your installed packages using pip:

pip show langflow

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show langflow command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-306: Missing Authentication for Critical Function, where the product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-cf6m-vc3m-7cgm. This link is maintained to preserve external references. ## Original Description IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).

GHSA-9cc5-j3qq-69gv Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
langflow
pypi/langflow
PyPI
≥ 1.7.0
≤ 1.9.0

References

NVD — GHSA-9cc5-j3qq-69gv NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8505
www.ibm.com/support/pages/node/... WEB
https://www.ibm.com/support/pages/node/7278921

Frequently Asked Questions

What is GHSA-9cc5-j3qq-69gv?
GHSA-9cc5-j3qq-69gv is a security vulnerability in Duplicate Advisory involving Unauthenticated Flow Execution via Webhook Authentication Bypass under CWE-306: Missing Authentication for Critical Function.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: langflow.
What version fixes GHSA-9cc5-j3qq-69gv?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is langflow affected?
Yes, langflow is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-9cc5-j3qq-69gv?
GHSA-9cc5-j3qq-69gv has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-9cc5-j3qq-69gv?
GHSA-9cc5-j3qq-69gv is classified under CWE-306: Missing Authentication for Critical Function (The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.).
How can I check PyPI dependencies for GHSA-9cc5-j3qq-69gv?
Run the dependency tree command: 'pip show langflow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9cc5-j3qq-69gv",
  "modified" : "2026-10-05T22:31:17Z",
  "published" : "2026-07-17T21:31:45Z",
  "withdrawn" : "2026-10-05T22:31:17Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Unauthenticated Flow Execution via Webhook Authentication Bypass",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-cf6m-vc3m-7cgm. This link is maintained to preserve external references.\n\n## Original Description\nIBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "langflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.7.0"
      }, {
        "last_affected" : "1.9.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-8505"
  }, {
    "type" : "WEB",
    "url" : "https://www.ibm.com/support/pages/node/7278921"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-306" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-05T22:31:17Z",
    "nvd_published_at" : "2026-07-17T20:17:31Z"
  }
}