CVE-2026-8505: Vulnerability in IBM Langflow OSS
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).
AI Analysis
Technical Summary
CVE-2026-8505 affects IBM Langflow OSS versions 1.0.0 through 1.10.0. The vulnerability arises from improper authentication in the webhook mechanism, where disabling webhook authentication (WEBHOOK_AUTH_ENABLE=False) causes the system to skip API key validation. This allows remote attackers who know a flow's UUID to execute that flow without authentication, potentially resulting in remote code execution. The CVSS 3.1 base score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
An unauthenticated remote attacker can execute arbitrary flows by exploiting the webhook authentication bypass. This can lead to remote code execution with the privileges of the flow owner, compromising system confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should ensure that WEBHOOK_AUTH_ENABLE is set to True to enforce API key validation on webhook requests and restrict access to flow UUIDs to trusted parties only.
CVE-2026-8505: Vulnerability in IBM Langflow OSS
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).
CVSS v3.1
Score 9.8critical
Affected software
pkg:github/ibm/langflow_osscpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.10.0:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8505 affects IBM Langflow OSS versions 1.0.0 through 1.10.0. The vulnerability arises from improper authentication in the webhook mechanism, where disabling webhook authentication (WEBHOOK_AUTH_ENABLE=False) causes the system to skip API key validation. This allows remote attackers who know a flow's UUID to execute that flow without authentication, potentially resulting in remote code execution. The CVSS 3.1 base score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
An unauthenticated remote attacker can execute arbitrary flows by exploiting the webhook authentication bypass. This can lead to remote code execution with the privileges of the flow owner, compromising system confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should ensure that WEBHOOK_AUTH_ENABLE is set to True to enforce API key validation on webhook requests and restrict access to flow UUIDs to trusted parties only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-13T22:04:50.617Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5b401834329bf928c71344
Added to database: 07/18/2026, 08:58:00 UTC
Last enriched: 07/25/2026, 22:13:29 UTC
Last updated: 08/31/2026, 23:06:15 UTC
Views: 132
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.