CVE-2026-69263
Flowise: CVE-2025-8943 Patch Bypass: npm_config_yes bypasses MCP environment variable blocklist (Unauthenticated RCE)
Description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the mitigation for CVE-2025-8943 blocked -y and --yes flags on npx, but packages/components/nodes/tools/MCP/core.ts denied only PATH, LD_LIBRARY_PATH, DYLD_LIBRARY_PATH, and NODE_OPTIONS by exact environment-variable name. Because npm reads configuration from npm_config_* variables, setting npm_config_yes=true reproduced --yes behavior without using a blocked flag, causing npx to auto-install and execute the named package when a Custom MCP server launched. This issue is fixed in version 3.1.3.
INFO
Published Date :
Aug. 4, 2026, 5:17 p.m.
Last Modified :
Sept. 14, 2026, 7:24 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Flowise to version 3.1.3.
- Verify npm and npx configurations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-69263.
| URL | Resource |
|---|---|
| https://github.com/FlowiseAI/Flowise/commit/a4c4e4988cded15edf725e762560575b889ae351 | Patch |
| https://github.com/FlowiseAI/Flowise/pull/6471 | Issue Tracking Patch |
| https://github.com/FlowiseAI/Flowise/releases/tag/[email protected] | Patch Release Notes |
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw | Exploit Vendor Advisory |
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-69263 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-69263
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-69263 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-69263 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* versions up to (excluding) 3.1.3 Added Reference Type GitHub, Inc.: https://github.com/FlowiseAI/Flowise/commit/a4c4e4988cded15edf725e762560575b889ae351 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/FlowiseAI/Flowise/pull/6471 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/FlowiseAI/Flowise/releases/tag/[email protected] Types: Patch, Release Notes Added Reference Type GitHub, Inc.: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 04, 2026
Action Type Old Value New Value Added Reference https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw Added SSVC {'id': 'CVE-2026-69263', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-04T17:20:09.751060Z'} -
New CVE Received by [email protected]
Aug. 04, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'FlowiseAI', 'product': 'Flowise', 'versions': [{'status': 'affected', 'version': '< 3.1.3'}]}] Added Description Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the mitigation for CVE-2025-8943 blocked -y and --yes flags on npx, but packages/components/nodes/tools/MCP/core.ts denied only PATH, LD_LIBRARY_PATH, DYLD_LIBRARY_PATH, and NODE_OPTIONS by exact environment-variable name. Because npm reads configuration from npm_config_* variables, setting npm_config_yes=true reproduced --yes behavior without using a blocked flag, causing npx to auto-install and execute the named package when a Custom MCP server launched. This issue is fixed in version 3.1.3. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-184 Added Reference https://github.com/FlowiseAI/Flowise/commit/a4c4e4988cded15edf725e762560575b889ae351 Added Reference https://github.com/FlowiseAI/Flowise/pull/6471 Added Reference https://github.com/FlowiseAI/Flowise/releases/tag/[email protected] Added Reference https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw