CVE-2026-56276

MEDIUMPre-NVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 84% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.0Exploit: NoneExposed: 0

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

Flowise before 3.1.2 contains a mass assignment vulnerability in the PUT /api/v1/user endpoint that allows authenticated users to directly modify the credential field without validation. Attackers can bypass password change verification and session invalidation by supplying a crafted password hash, establishing persistent account access after temporary session compromise.

CVSS v3
6.0
EG Score
6.0(medium)
EPSS
16.3%
KEV
Not listed

Published

June 20, 2026

Last Modified

June 22, 2026

Advisory Details (2)

Auto-updated Jun 20, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Flowise - Mass Assignment in PUT /api/v1/user Allows Password Hash Override | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override
github Patch Available🟡 PoC Available

Mass Assignment in PUT /api/v1/user Allows Authenticated Users to Override Password Hash and Bypass Password Change Verification · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39

Vendor Advisories for CVE-2026-56276(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 54× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 13:41 UTCEG score recompute
  4. 2026-07-06 13:40 UTCGHSA enrichment
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 13:52 UTCEG score recompute
  8. 2026-07-05 13:52 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 14:04 UTCEG score recompute
  12. 2026-07-04 14:04 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 14:09 UTCEG score recompute
  16. 2026-07-03 14:09 UTCGHSA enrichment
  17. 2026-07-02 14:21 UTCEG score recompute
  18. 2026-07-02 14:21 UTCGHSA enrichment
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 14:34 UTCEG score recompute
  21. 2026-07-01 14:34 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 14:46 UTCEG score recompute
  24. 2026-06-30 14:45 UTCGHSA enrichment
  25. 2026-06-29 14:55 UTCEG score recompute
Show 29 more
  1. 2026-06-29 14:55 UTCGHSA enrichment
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-29 14:06 UTCEPSS rescore
  4. 2026-06-28 15:08 UTCEG score recompute
  5. 2026-06-28 15:07 UTCGHSA enrichment
  6. 2026-06-28 14:07 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-28 04:56 UTCEPSS rescore
  9. 2026-06-27 15:19 UTCEG score recompute
  10. 2026-06-27 15:19 UTCGHSA enrichment
  11. 2026-06-27 03:08 UTCEPSS rescore
  12. 2026-06-26 15:31 UTCEG score recompute
  13. 2026-06-26 15:31 UTCGHSA enrichment
  14. 2026-06-25 15:43 UTCEG score recompute
  15. 2026-06-25 15:43 UTCGHSA enrichment
  16. 2026-06-25 13:49 UTCEPSS rescore
  17. 2026-06-24 15:56 UTCEG score recompute
  18. 2026-06-24 15:55 UTCGHSA enrichment
  19. 2026-06-24 14:05 UTCEPSS rescore
  20. 2026-06-23 21:33 UTCEPSS rescore
  21. 2026-06-23 21:33 UTCEPSS rescore
  22. 2026-06-23 16:07 UTCEG score recompute
  23. 2026-06-23 16:07 UTCGHSA enrichment
  24. 2026-06-22 16:15 UTCEG score recompute
  25. 2026-06-22 16:14 UTCGHSA enrichment
  26. 2026-06-21 16:25 UTCEG score recompute
  27. 2026-06-21 16:25 UTCGHSA enrichment
  28. 2026-06-20 16:37 UTCEG score recompute
  29. 2026-06-20 16:35 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-56276?
CVE-2026-56276 is a medium vulnerability published on June 20, 2026. Flowise before 3.1.2 contains a mass assignment vulnerability in the PUT /api/v1/user endpoint that allows authenticated users to directly modify the credential field without validation. Attackers can bypass password change verification and session invalidation by supplying a crafted password hash,…
When was CVE-2026-56276 disclosed?
CVE-2026-56276 was first published in the National Vulnerability Database on June 20, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56276 actively exploited?
CVE-2026-56276 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56276?
CVE-2026-56276 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-56276?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56276, 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

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