CVE-2026-41273: CWE-306: Missing Authentication for Critical Function in FlowiseAI Flowise
Flowise versions prior to 3. 1. 0 have an authentication bypass vulnerability that allows unauthenticated attackers to obtain OAuth 2. 0 access tokens linked to public chatflows. By accessing a public chatflow configuration endpoint, attackers can retrieve internal workflow data including OAuth credential identifiers, enabling them to refresh and acquire valid OAuth tokens without authentication. This vulnerability is fixed in version 3. 1. 0.
AI Analysis
Technical Summary
CVE-2026-41273 is a high-severity authentication bypass vulnerability (CWE-306) in FlowiseAI's Flowise product before version 3.1.0. The flaw allows unauthenticated attackers to access a public chatflow configuration endpoint and extract internal workflow data, including OAuth credential identifiers. Using these identifiers, attackers can refresh and obtain valid OAuth 2.0 access tokens without any authentication, potentially compromising OAuth-protected resources. The vulnerability is resolved in Flowise version 3.1.0.
Potential Impact
An attacker can obtain valid OAuth 2.0 access tokens without authentication by exploiting this vulnerability, potentially leading to unauthorized access to resources protected by these tokens. The impact is significant due to the ability to bypass authentication mechanisms and access sensitive OAuth credentials.
Mitigation Recommendations
Upgrade Flowise to version 3.1.0 or later, where this authentication bypass vulnerability has been fixed. There is no official patch link provided, but the vendor has addressed the issue in the stated version. Until upgraded, restrict access to public chatflow configuration endpoints to trusted users only.
CVE-2026-41273: CWE-306: Missing Authentication for Critical Function in FlowiseAI Flowise
Description
Flowise versions prior to 3. 1. 0 have an authentication bypass vulnerability that allows unauthenticated attackers to obtain OAuth 2. 0 access tokens linked to public chatflows. By accessing a public chatflow configuration endpoint, attackers can retrieve internal workflow data including OAuth credential identifiers, enabling them to refresh and acquire valid OAuth tokens without authentication. This vulnerability is fixed in version 3. 1. 0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-41273 is a high-severity authentication bypass vulnerability (CWE-306) in FlowiseAI's Flowise product before version 3.1.0. The flaw allows unauthenticated attackers to access a public chatflow configuration endpoint and extract internal workflow data, including OAuth credential identifiers. Using these identifiers, attackers can refresh and obtain valid OAuth 2.0 access tokens without any authentication, potentially compromising OAuth-protected resources. The vulnerability is resolved in Flowise version 3.1.0.
Potential Impact
An attacker can obtain valid OAuth 2.0 access tokens without authentication by exploiting this vulnerability, potentially leading to unauthorized access to resources protected by these tokens. The impact is significant due to the ability to bypass authentication mechanisms and access sensitive OAuth credentials.
Mitigation Recommendations
Upgrade Flowise to version 3.1.0 or later, where this authentication bypass vulnerability has been fixed. There is no official patch link provided, but the vendor has addressed the issue in the stated version. Until upgraded, restrict access to public chatflow configuration endpoints to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-18T14:01:46.801Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ea782987115cfb6850f83a
Added to database: 4/23/2026, 7:51:05 PM
Last enriched: 4/23/2026, 8:06:12 PM
Last updated: 4/23/2026, 9:01:34 PM
Views: 5
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