CVE-2026-91932

9.0 criticalEPSS 0.7%

Critical (9.0). EPSS 0.7% chance of exploitation in the next 30 days.

Flowise before 3.1.4 contains a validation bypass vulnerability in MCP server configuration allowing authenticated attackers remote code execution through an unvalidated cwd parameter. Attackers can bypass path validation using clean filenames in the args array while controlling the working directory to execute malicious code.

Severity

CVSS 4.0

9.0 critical

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS 3.1

8.5 high

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

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2026-09-15
Modified: 2026-09-16
Record from: the NVD, synced 2026-10-19

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x7x8-95gh-42xm
https://www.vulncheck.com/advisories/flowise-before-3.1.4-remote-code-execution-via-cwd-parameter
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x7x8-95gh-42xm

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