CVE-2026-73601

Q: How do I fix CVE-2026-73601?

Upgrade flowise to 3.1.3 or later.

Q: Is CVE-2026-73601 being actively exploited?

Not that we know of. CVE-2026-73601 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.88% is the estimated probability that it will be exploited in the next 30 days. That is higher than 57% of all scored CVEs.

Q: How severe is CVE-2026-73601?

CVE-2026-73601 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-73601 affect?

Published advisories record a fix for flowise (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

8.8

CVSS v3

NVD

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.

CWE-95

How to fix

Remediation Available

flowiseNVD

Affected:< 3.1.3Fixed in:3.1.3CVE-2026-73601derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.88%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Vendor Advisory1

github.com

Third-Party Advisory1

vulncheck.com

Related Vulnerabilities

Other CWE-95 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-24893	Critical	9.8	100%	KEV	Fix
CVE-2024-36401	Critical	9.8	100%	KEV	Fix
CVE-2026-33017	Critical	9.8	96%	KEV	Fix
CVE-2024-21650	Critical	10.0	93%	-	Fix
CVE-2023-37462	Critical	9.9	92%	-	Fix
CVE-2024-7954	Critical	9.8	90%	-	Fix

Common questions

How do I fix CVE-2026-73601?

Upgrade flowise to 3.1.3 or later.

Is CVE-2026-73601 being actively exploited?

Not that we know of. CVE-2026-73601 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.88% is the estimated probability that it will be exploited in the next 30 days. That is higher than 57% of all scored CVEs.

How severe is CVE-2026-73601?

CVE-2026-73601 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-73601 affect?

Published advisories record a fix for flowise (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-73601

Markdown

[![CVE-2026-73601](https://tridentstack.com/cve/badge/CVE-2026-73601.svg)](https://tridentstack.com/cve/CVE-2026-73601)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-73601"><img src="https://tridentstack.com/cve/badge/CVE-2026-73601.svg" alt="CVE-2026-73601"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Scan your fleet free Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-04.