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Vulnerability Details :

CVE-2026-56276

Summary
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At-20 Jun, 2026 | 15:24
Updated At-22 Jun, 2026 | 13:50
Rejected At-
Credits

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

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:VulnCheck
Assigner Org ID:83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At:20 Jun, 2026 | 15:24
Updated At:22 Jun, 2026 | 13:50
Rejected At:
▼CVE Numbering Authority (CNA)
Flowise - Mass Assignment in PUT /api/v1/user Allows Password Hash Override

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.

Affected Products
Vendor
Flowise
Product
Flowise
Default Status
unaffected
Versions
Affected
  • From 0 before 3.1.2 (semver)
Unaffected
  • 3.1.2 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes
Type: CWE
CWE ID: CWE-915
Description: Improperly Controlled Modification of Dynamically-Determined Object Attributes
Metrics
VersionBase scoreBase severityVector
4.06.0MEDIUM
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Version: 4.0
Base score: 6.0
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
reporter
berkdedekarginoglu
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
vendor-advisory
https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override
third-party-advisory
Hyperlink: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
Resource:
vendor-advisory
Hyperlink: https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
exploit
Hyperlink: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
Resource:
exploit
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:disclosure@vulncheck.com
Published At:20 Jun, 2026 | 16:17
Updated At:22 Jun, 2026 | 18:36

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.06.0MEDIUM
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/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
N/A
Type: Secondary
Version: 4.0
Base score: 6.0
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/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
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-915Secondarydisclosure@vulncheck.com
CWE ID: CWE-915
Type: Secondary
Source: disclosure@vulncheck.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39disclosure@vulncheck.com
N/A
https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-overridedisclosure@vulncheck.com
N/A
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39134c704f-9b21-4f2e-91b3-4a467353bcc0
N/A
Hyperlink: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource: N/A

Change History

0
Information is not available yet

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