gcdRadar
archive/Patch now/AIR-2026-0246
closedclosed 17 Jul 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-8505: Langflow Unauthenticated Flow Execution via Webhook Bypass

Langflow

Langflow webhook authentication logic improperly bypassed API key validation when specific configurations were disabled. An unauthenticated attacker knowing a flow UUID could trigger its execution.

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
9.8
EPSS
0.01 · top 39% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
17 Jul 2026
last update
5 Oct 2026
CVE ids
CVE-2026-8505other records

Timeline · 2

  1. 17 Jul 2026CVE-2026-8505: IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users…
  2. 5 Oct 2026CVE-2026-8505: Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass

Sources · 2

Advisories and databases

  1. 2026-07-17
    CVE-2026-8505: IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-8505
  2. 2026-10-05
    CVE-2026-8505: Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass
    GitHub Advisory Database · github.com/advisories/GHSA-cf6m-vc3m-7cgm

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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
authentication-bypassrce
dates
happened 5 Oct 2026 · first reported 17 Jul 2026
origin
GitHub Advisory Database
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 10:04Z

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-2026-8505: Langflow Unauthenticated Flow Execution via Webhook Bypass

https://gcdradar.vercel.app/incidents/cve-2026-8505-langflow-unauthenticated-flow-execution-via-we · AIR-2026-0246 · closed 2026-07-17

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-07-17 (happened 2026-10-05)
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-8505
- CVSS: 9.8

## Summary

Langflow webhook authentication logic improperly bypassed API key validation when specific configurations were disabled. An unauthenticated attacker knowing a flow UUID could trigger its execution.

## What to do

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

## Latest updates

- 2026-10-05: CVE-2026-8505: Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass (https://github.com/advisories/GHSA-cf6m-vc3m-7cgm)
- 2026-07-17: CVE-2026-8505: IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users… (https://nvd.nist.gov/vuln/detail/CVE-2026-8505)

## Sources

- 2026-07-17 NVD: CVE-2026-8505: IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users… https://nvd.nist.gov/vuln/detail/CVE-2026-8505
- 2026-10-05 GitHub Advisory Database: CVE-2026-8505: Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass https://github.com/advisories/GHSA-cf6m-vc3m-7cgm

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

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