CVE-2026-56271

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-12. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
29.8%
KEV
Not listed

Published

July 12, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Jul 13, 2026
Patch available. Sources: github.
generic

Flowise - Weak Default JWT Secrets in Authentication Middleware | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flowise-weak-default-jwt-secrets-in-authentication-middleware
github Patch Available

Weak Default JWT Secrets · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cc4f-hjpj-g9p8

Vendor Advisories for CVE-2026-56271(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
flowise—3.1.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 45× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 21:25 UTCEG score recompute
  2. 2026-07-15 21:25 UTCGHSA enrichment
  3. 2026-07-15 17:08 UTCEG score recompute
  4. 2026-07-15 17:08 UTCGHSA enrichment
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 16:57 UTCEPSS rescore
  7. 2026-07-15 12:52 UTCEG score recompute
  8. 2026-07-15 12:51 UTCGHSA enrichment
  9. 2026-07-15 08:35 UTCEG score recompute
  10. 2026-07-15 08:35 UTCGHSA enrichment
  11. 2026-07-15 04:18 UTCEG score recompute
  12. 2026-07-15 04:18 UTCGHSA enrichment
  13. 2026-07-15 02:00 UTCEPSS rescore
  14. 2026-07-15 02:00 UTCEPSS rescore
  15. 2026-07-15 00:01 UTCEG score recompute
  16. 2026-07-15 00:01 UTCGHSA enrichment
  17. 2026-07-14 19:45 UTCEG score recompute
  18. 2026-07-14 19:45 UTCGHSA enrichment
  19. 2026-07-14 15:29 UTCEG score recompute
  20. 2026-07-14 15:29 UTCGHSA enrichment
  21. 2026-07-14 11:13 UTCEG score recompute
  22. 2026-07-14 11:13 UTCGHSA enrichment
  23. 2026-07-14 06:55 UTCEG score recompute
  24. 2026-07-14 06:55 UTCGHSA enrichment
  25. 2026-07-14 02:39 UTCEG score recompute
Show 20 more
  1. 2026-07-14 02:38 UTCGHSA enrichment
  2. 2026-07-13 22:31 UTCEPSS rescore
  3. 2026-07-13 22:23 UTCEG score recompute
  4. 2026-07-13 22:23 UTCGHSA enrichment
  5. 2026-07-13 18:07 UTCEG score recompute
  6. 2026-07-13 18:07 UTCGHSA enrichment
  7. 2026-07-13 13:50 UTCEG score recompute
  8. 2026-07-13 13:50 UTCGHSA enrichment
  9. 2026-07-13 09:34 UTCEG score recompute
  10. 2026-07-13 09:34 UTCGHSA enrichment
  11. 2026-07-13 05:19 UTCEG score recompute
  12. 2026-07-13 05:18 UTCGHSA enrichment
  13. 2026-07-13 01:02 UTCEG score recompute
  14. 2026-07-13 01:02 UTCGHSA enrichment
  15. 2026-07-12 20:46 UTCEG score recompute
  16. 2026-07-12 20:46 UTCGHSA enrichment
  17. 2026-07-12 16:29 UTCEG score recompute
  18. 2026-07-12 16:29 UTCGHSA enrichment
  19. 2026-07-12 12:13 UTCEG score recompute
  20. 2026-07-12 12:12 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-56271?
CVE-2026-56271 is a critical vulnerability published on July 12, 2026. Flowise before 3.1.0 (affected versions 3.0.13 and earlier) uses weak hardcoded default JWT secrets ('authtoken', 'refreshtoken') and default audience and issuer values ('AUDIENCE', 'ISSUER') in the enterprise passport authentication middleware…
When was CVE-2026-56271 disclosed?
CVE-2026-56271 was first published in the National Vulnerability Database on July 12, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56271 actively exploited?
CVE-2026-56271 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56271?
CVE-2026-56271 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-56271?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56271, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-56271

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