CVE-2026-73601
Last modified
CVE-2026-73601 is a critical-severity vulnerability rated 9/10 on the CVSS scale. Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP node when CUSTOM_MCP_PROTOCOL is set to stdio, allowing authenticated users to execute arbitrary commands by manipulating environment variables and command arguments. Attackers can abuse PYTHONWARNINGS and BROWSER environment variables with python3, or leverage the root working directory with node to bypass validation and execute system commands.. EPSS estimates a 0.61% chance of exploitation in the next 30 days.
Description
Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP node when CUSTOM_MCP_PROTOCOL is set to stdio, allowing authenticated users to execute arbitrary commands by manipulating environment variables and command arguments. Attackers can abuse PYTHONWARNINGS and BROWSER environment variables with python3, or leverage the root working directory with node to bypass validation and execute system commands.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| FlowiseAI | Flowise | < 3.1.3 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-73601?
How severe is CVE-2026-73601?
How do I fix CVE-2026-73601?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-7358Use after free in Animation in Google Chrome prior to 147.0.…8.8
- CVE-2026-73583A flaw was found in sblim-sfcb. A local attacker with access…6.6
- CVE-2026-73584A flaw was found in sblim-sfcb. A local, low-privileged atta…6.3
- CVE-2026-73585A flaw was found in sblim-cmpi-base. Insecure temporary file…6.3
- CVE-2026-7359Use after free in ANGLE in Google Chrome prior to 147.0.7727…8.8
- CVE-2026-7360Insufficient validation of untrusted input. in Compositing i…3.1
- CVE-2026-73602Flowise before 3.1.3 contains a sandbox escape vulnerability…9
- CVE-2026-73603Flowise before 3.1.4 fails to validate chatflow visibility i…6.3
- CVE-2026-73604Flowise before 3.1.3 contains an incomplete credential redac…7.1
- CVE-2026-73605SiYuan versions before v3.7.4 contain a path traversal vulne…6.9
- CVE-2026-73606SiYuan versions before v3.7.4 contain an information disclos…6.9
- CVE-2026-73607SiYuan versions before v3.7.4 contain an information disclos…6.9
Are you affected by CVE-2026-73601?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST