CVE-2026-56271

CVE Enrichment

CVSS: 9.3 CRITICAL
EPSS: 0.66%
EPSS Percentile: 50.02%
CISA KEV: Not listed

Description

Flowise before 3.1.0 (affected versions 3.0.13 and earlier) uses weak hardcoded default JWT secrets ('auth_token', 'refresh_token') and default audience and issuer values ('AUDIENCE', 'ISSUER') in the enterprise passport authentication middleware (packages/server/src/enterprise/middleware/passport/index.ts). When the corresponding environment variables (JWT_AUTH_TOKEN_SECRET, JWT_REFRESH_TOKEN_SECRET, JWT_AUDIENCE, JWT_ISSUER) are not set, the application silently falls back to these publicly known defaults, allowing an attacker to forge valid JWTs and impersonate any user, including administrators, resulting in authentication bypass.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: disclosure@vulncheck.com
Published: 12-Jul-2026 19:16
Last Modified: 15-Jul-2026 01:24
EPSS Date: 2026-10-13
CWE: CWE-321

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:N /
                            PR:N /
                            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

Affected Products / Versions

flowiseai / flowise
Version / affected range: * · before (exclusive) 3.1.0
cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*

References

Last enrichment sync: 14-Oct-2026 07:15
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

CVE-2026-56271 Recorded Future Reports 94 High-Impact Vulnerabilities in September 2026, Including 80 Actively Exploited

CVE (76)

Malware (6)

Threat Actors (8)

Vendors (10)

Products (67)

Tools (7)

Industries (1)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.