CVE-2026-19294: CWE-639 Authorization Bypass Through User-Controlled Key in IBM Langflow OSS
Description
IBM Langflow OSS versions 1.0.0 through 1.11.1 contain an authorization bypass vulnerability (CWE-639) that allows a remote authenticated attacker to execute and read any user's private flow. This occurs due to improper authorization checks related to user-controlled keys. The vulnerability has a CVSS 3.1 base score of 6.4, indicating a medium severity impact.
CVSS v3.1
Score 6.4medium
Affected software
IBM
Langflow OSS
cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.11.1:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-19294 affects IBM Langflow OSS versions 1.0.0 through 1.11.1. The vulnerability is an authorization bypass (CWE-639) where a remote attacker with valid authentication can exploit improper authorization logic involving user-controlled keys to access and execute private flows belonging to other users. This flaw compromises confidentiality and integrity of user data within the affected versions.
Potential Impact
An attacker with authenticated access can read and execute private flows of other users, leading to unauthorized disclosure and potential manipulation of sensitive data. The vulnerability does not affect availability. The CVSS score of 6.4 reflects a medium severity impact primarily on confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor IBM advisories for updates and consider restricting authenticated user privileges until a fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-07T16:42:51.024Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9206c3acd9273b4963cea4
Added to database: 08/28/2026, 22:08:03 UTC
Last enriched: 09/07/2026, 15:27:02 UTC
Last updated: 10/11/2026, 06:48:15 UTC
Views: 61
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.