AUGUST 27, 2026
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Case File

CVE-2026-56271

CRITICAL · CVSS 9.8 EPSS 0.38% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-12 · Last synced 2026-08-11

CyberRota Analysis

AI-Generated

Flowise versions prior to 3.1.0 contain hardcoded default JWT secrets and configuration values that can be exploited if the corresponding environment variables are not set. This vulnerability allows attackers to forge valid JWTs, leading to potential authentication bypass and unauthorized access to user accounts, including administrative privileges. Organizations using affected versions should prioritize immediate updates to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-56271
Severity
CRITICAL
CVSS
9.8
EPSS
0.38%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)