CVE-2026-56271

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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 — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 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(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

July 12, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Sep 12, 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 18× in last 7d / 96× 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.

Showing the most recent 100 of 326 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 10:07 UTCGHSA enrichment
  3. 2026-09-18 05:10 UTCEG score recompute
  4. 2026-09-18 05:10 UTCGHSA enrichment
  5. 2026-09-17 19:31 UTCEPSS rescore
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 03:11 UTCEPSS rescore
  9. 2026-09-14 08:13 UTCGHSA enrichment
  10. 2026-09-14 03:51 UTCGHSA enrichment
  11. 2026-09-13 23:36 UTCEG score recompute
  12. 2026-09-13 23:36 UTCGHSA enrichment
  13. 2026-09-13 16:47 UTCEPSS rescore
  14. 2026-09-13 16:40 UTCGHSA enrichment
  15. 2026-09-13 12:21 UTCGHSA enrichment
  16. 2026-09-13 08:06 UTCEG score recompute
  17. 2026-09-13 08:05 UTCGHSA enrichment
  18. 2026-09-12 13:31 UTCGHSA enrichment
  19. 2026-09-12 02:05 UTCEG score recompute
  20. 2026-09-12 02:05 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-10 09:35 UTCEPSS rescore
  23. 2026-09-08 22:01 UTCEPSS rescore
  24. 2026-09-08 02:19 UTCEG score recompute
  25. 2026-09-08 02:19 UTCGHSA enrichment
Show 75 more
  1. 2026-09-07 16:01 UTCEPSS rescore
  2. 2026-09-06 13:54 UTCEG score recompute
  3. 2026-09-06 13:54 UTCGHSA enrichment
  4. 2026-09-06 13:47 UTCEPSS rescore
  5. 2026-09-06 01:54 UTCGHSA enrichment
  6. 2026-09-05 21:34 UTCEG score recompute
  7. 2026-09-05 21:34 UTCGHSA enrichment
  8. 2026-09-04 05:07 UTCEPSS rescore
  9. 2026-09-02 14:12 UTCEPSS rescore
  10. 2026-09-01 13:54 UTCEPSS rescore
  11. 2026-09-01 04:40 UTCEPSS rescore
  12. 2026-08-31 01:00 UTCGHSA enrichment
  13. 2026-08-30 20:45 UTCEG score recompute
  14. 2026-08-30 20:44 UTCGHSA enrichment
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 16:29 UTCGHSA enrichment
  17. 2026-08-30 11:10 UTCGHSA enrichment
  18. 2026-08-30 05:45 UTCEG score recompute
  19. 2026-08-30 05:45 UTCGHSA enrichment
  20. 2026-08-30 01:22 UTCEPSS rescore
  21. 2026-08-28 21:41 UTCEPSS rescore
  22. 2026-08-28 02:37 UTCGHSA enrichment
  23. 2026-08-27 21:37 UTCEG score recompute
  24. 2026-08-27 21:37 UTCGHSA enrichment
  25. 2026-08-27 14:25 UTCEPSS rescore
  26. 2026-08-27 14:16 UTCGHSA enrichment
  27. 2026-08-27 00:21 UTCEG score recompute
  28. 2026-08-27 00:21 UTCGHSA enrichment
  29. 2026-08-26 14:46 UTCEPSS rescore
  30. 2026-08-26 12:52 UTCGHSA enrichment
  31. 2026-08-26 08:06 UTCGHSA enrichment
  32. 2026-08-26 02:42 UTCGHSA enrichment
  33. 2026-08-25 19:19 UTCGHSA enrichment
  34. 2026-08-25 14:43 UTCEG score recompute
  35. 2026-08-25 14:43 UTCGHSA enrichment
  36. 2026-08-25 13:49 UTCEPSS rescore
  37. 2026-08-25 09:44 UTCGHSA enrichment
  38. 2026-08-25 04:39 UTCGHSA enrichment
  39. 2026-08-25 00:23 UTCGHSA enrichment
  40. 2026-08-24 20:07 UTCEG score recompute
  41. 2026-08-24 20:07 UTCGHSA enrichment
  42. 2026-08-24 13:39 UTCEG score recompute
  43. 2026-08-24 13:39 UTCGHSA enrichment
  44. 2026-08-24 09:23 UTCGHSA enrichment
  45. 2026-08-24 05:05 UTCGHSA enrichment
  46. 2026-08-24 00:49 UTCGHSA enrichment
  47. 2026-08-23 20:34 UTCGHSA enrichment
  48. 2026-08-23 16:18 UTCGHSA enrichment
  49. 2026-08-23 12:02 UTCGHSA enrichment
  50. 2026-08-23 07:47 UTCGHSA enrichment
  51. 2026-08-23 03:32 UTCEG score recompute
  52. 2026-08-23 03:32 UTCGHSA enrichment
  53. 2026-08-23 00:19 UTCEPSS rescore
  54. 2026-08-22 23:15 UTCGHSA enrichment
  55. 2026-08-22 18:59 UTCGHSA enrichment
  56. 2026-08-22 14:43 UTCGHSA enrichment
  57. 2026-08-22 09:48 UTCGHSA enrichment
  58. 2026-08-22 05:31 UTCGHSA enrichment
  59. 2026-08-22 01:13 UTCEG score recompute
  60. 2026-08-22 01:13 UTCGHSA enrichment
  61. 2026-08-21 23:49 UTCEPSS rescore
  62. 2026-08-21 20:57 UTCGHSA enrichment
  63. 2026-08-21 16:41 UTCGHSA enrichment
  64. 2026-08-21 12:14 UTCGHSA enrichment
  65. 2026-08-21 07:58 UTCGHSA enrichment
  66. 2026-08-21 03:42 UTCGHSA enrichment
  67. 2026-08-20 23:14 UTCEG score recompute
  68. 2026-08-20 23:14 UTCGHSA enrichment
  69. 2026-08-20 22:55 UTCEPSS rescore
  70. 2026-08-20 18:59 UTCGHSA enrichment
  71. 2026-08-20 14:44 UTCGHSA enrichment
  72. 2026-08-20 09:56 UTCGHSA enrichment
  73. 2026-08-20 05:41 UTCGHSA enrichment
  74. 2026-08-20 01:25 UTCEG score recompute
  75. 2026-08-20 01:25 UTCGHSA enrichment

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 1% probability of exploitation in the next 30 days, which ranks it in the top 50.1% of all scored CVEs.
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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