{"id":"GHSA-cc4f-hjpj-g9p8","revision":null,"records":[{"revision":"06fe427e4b0249eab010924e44fab292","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-56271","aliases":[],"title":"Flowise - Weak Default JWT Secrets in Authentication Middleware","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.","state":0,"publishedAt":"2026-07-12T12:06:32.246+00:00","modifiedAt":"2026-07-13T15:41:09.159+00:00","affected":[{"ecosystem":"Vendor product","name":"Flowise","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Flowise\",\n                    \"product\": \"Flowise\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/flowise\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.1.0\"\n                        },\n                        {\n                            \"version\": \"3.1.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cc4f-hjpj-g9p8","https://www.vulncheck.com/advisories/flowise-weak-default-jwt-secrets-in-authentication-middleware"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56271","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-56271","identifiers":["CVE-2026-56271"]},"retained":false,"historicalAffected":[]},{"revision":"233332942afe44d3be14912b4991ca88","observedAt":"2026-11-07T12:35:09.87+00:00","statement":{"source":"euvd","id":"EUVD-2026-43228","aliases":["CVE-2026-56271","GHSA-jpvq-qwhh-pw47"],"title":"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 midd…","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). 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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.","state":0,"publishedAt":"2026-07-12T12:16:45.29+00:00","modifiedAt":"2026-10-25T15:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","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","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cc4f-hjpj-g9p8","https://www.vulncheck.com/advisories/flowise-weak-default-jwt-secrets-in-authentication-middleware"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56271","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-321"],"productCriteria":["cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-07-12T12:16:45.290","lastModified":"2026-10-25T15:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-56271","identifiers":["CVE-2026-56271"]},"retained":false,"historicalAffected":[]},{"revision":"b43744d9d70f4c1db8751a864db311da","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-cc4f-hjpj-g9p8","aliases":["CVE-2026-56271"],"title":"Flowise: Weak Default JWT Secrets","description":"**Detection Method:** Kolega.dev Deep Code Scan\n\n| Attribute | Value |\n|---|---|\n| Severity | Critical |\n| Location | packages/server/src/enterprise/middleware/passport/index.ts:29-34 |\n| Practical Exploitability | High |\n| Developer Approver | faizan@kolega.ai |\n\n### Description\nJWT secrets have weak hardcoded defaults ('auth_token', 'refresh_token', 'AUDIENCE', 'ISSUER'). Attackers can forge valid JWTs and impersonate any user.\n\n### Affected Code\n```\nconst jwtAudience = process.env.JWT_AUDIENCE || 'AUDIENCE'\nconst jwtIssuer = process.env.JWT_ISSUER || 'ISSUER'\nconst jwtAuthTokenSecret = process.env.JWT_AUTH_TOKEN_SECRET || 'auth_token'\nconst jwtRefreshSecret = process.env.JWT_REFRESH_TOKEN_SECRET || process.env.JWT_AUTH_TOKEN_SECRET || 'refresh_token'\n```\n\n### Evidence\nAll JWT defaults are weak strings. Refresh token falls back to auth token which is a design flaw. If any environment variable is unset, weak default is used.\n\n### Impact\nComplete authentication bypass. Attackers can forge valid JWTs for any user account. No authentication required to access protected endpoints. Can escalate to admin access.\n\n### Recommendation\nRemove all default secrets - require all JWT environment variables to be explicitly set. Add startup validation throwing error if any JWT secret is missing. Use cryptographically random secrets (256+ bits) for each secret independently. Implement JWT secret rotation mechanism.\n\n### Notes\nThe JWT secrets have genuinely weak hardcoded defaults ('auth_token', 'refresh_token', 'AUDIENCE', 'ISSUER') at lines 29-34. If an administrator deploys without setting the environment variables JWT_AUTH_TOKEN_SECRET, JWT_REFRESH_TOKEN_SECRET, JWT_AUDIENCE, and JWT_ISSUER, the application will use these trivially guessable values. An attacker knowing these defaults (which are publicly visible in the source code) can forge valid JWTs to impersonate any user, including administrators. The fallback chain at line 34 where jwtRefreshSecret falls back to jwtAuthTokenSecret is an additional design weakness - if only JWT_AUTH_TOKEN_SECRET is set, both tokens share the same secret. While .env.example files provide placeholder values, these are also weak and publicly visible. The application should fail to start if these secrets are not explicitly configured with strong values, rather than silently falling back to insecure defaults.","state":0,"publishedAt":"2026-04-16T21:21:12+00:00","modifiedAt":"2026-07-13T04:11:41.2243133+00:00","affected":[{"ecosystem":"npm","name":"flowise","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.1.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cc4f-hjpj-g9p8","https://github.com/FlowiseAI/Flowise"],"sourceUrl":"https://github.com/advisories/GHSA-cc4f-hjpj-g9p8","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-cc4f-hjpj-g9p8","identifiers":["GHSA-cc4f-hjpj-g9p8","CVE-2026-56271"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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