CVE-2026-56271 Details
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.
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Exploit prediction scoring system (EPSS) score for CVE-2026-56271
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.38 Probability of exploitation activity being observed over the next 30 days (30th percentile)
CVSS score for CVE-2026-56271
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9.8 Critical
Products affected by CVE-2026-56271
Flowise 2.1.3
Flowise 2.1.5
Flowise 2.2.2
Flowise 2.2.3
Flowise 2.2.5
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Medium
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CVE-2026-56271 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 34 30.09%
DE 17 15.04%
FI 8 7.08%
GB 7 6.19%
SG 6 5.31%
NL 5 4.42%
IN 5 4.42%
FR 5 4.42%
AU 4 3.54%
IE 4 3.54%

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CVE-2026-56271 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 99 95.19%
Telecommunications 5 4.81%

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