Medium severity · published Jun 20, 2026
CVE-2026-56276
Flowise - Mass Assignment in PUT /api/v1/user Allows Password Hash Override
6.0
CVSS
0.4%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flowise · Flowise
before 3.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56276
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56276
github.com
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
www.vulncheck.com
https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override
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