High
Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow
Type: advisorySources: OSV
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, Flowise contains an authentication bypass vulnerability that allows an unauthenticated attacker to obtain OAuth 2.0 access tokens associated with a public chatflow. By accessing a public chatflow configuration endpoint, an attacker can retrieve internal workflow data, including OAuth credential identifiers, which can then be used to refresh and obtain valid OAuth 2.0 access tokens without authentication. This vulnerability is fixed in 3.1.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-41273
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 00:01 UTC · Revision 1
Source evidence
Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow
core-osv · Original sourcePublished 23 Apr 2026, 19:29 UTC
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, Flowise contains an authentication bypass vulnerability that allows an unauthenticated attacker to obtain OAuth 2.0 access tokens associated with a public chatflow. By accessing a public chatflow configuration endpoint, an attacker can retrieve internal workflow data, including OAuth credential identifiers, which can then be used to refresh and obtain valid OAuth 2.0 access tokens without authentication. This vulnerability is fixed in 3.1.0.
osv:CVE-2026-41273
Complete source record
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"method": "structured",
"payload": {
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"title": "Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow",
"summary": "Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, Flowise contains an authentication bypass vulnerability that allows an unauthenticated attacker to obtain OAuth 2.0 access tokens associated with a public chatflow. By accessing a public chatflow configuration endpoint, an attacker can retrieve internal workflow data, including OAuth credential identifiers, which can then be used to refresh and obtain valid OAuth 2.0 access tokens without authentication. This vulnerability is fixed in 3.1.0.",
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"modified": "2026-10-28T02:30:24.540161749Z",
"provider": "osv",
"references": [
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}