CVE-2026-18904: 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 due to a namespace collision between user identifiers. This flaw could allow a remote attacker to obtain sensitive information and inject unauthorized messages without authentication.
CVSS v3.1
Score 8.2high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18904 is an authorization bypass vulnerability in IBM Langflow OSS versions 1.0.0 through 1.11.1. The issue arises from a namespace collision between user-controlled keys, enabling remote attackers to access sensitive data and inject unauthorized messages. The vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key). The CVSS v3.1 base score is 8.2, indicating high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high confidentiality impact with limited integrity impact.
Potential Impact
An attacker can remotely exploit this vulnerability without any privileges or user interaction to gain access to sensitive information and perform unauthorized message injections. This compromises confidentiality and partially affects integrity of the system.
Mitigation Recommendations
No official patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-rw3m-jm6r-xjcf
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-18904"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a92f7dbacd9273b49e75b0b
Added to database: 08/29/2026, 15:16:43 UTC
Last enriched: 09/08/2026, 02:37:12 UTC
Last updated: 10/13/2026, 18:48:18 UTC
Views: 36
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