CVE-2026-56276

CVE-2026-56276 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-915.

Key facts

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.

Frequently asked questions

What is CVE-2026-56276?
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.
How severe is CVE-2026-56276?
CVE-2026-56276 has a CVSS 4.0 base score of 6.0, rated medium severity.
Is CVE-2026-56276 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-56276?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-56276 have an EU (EUVD) identifier?
Yes. CVE-2026-56276 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38119.
When was CVE-2026-56276 published?
CVE-2026-56276 was published on 2026-06-20 and last updated on 2026-06-22.

References

Other CWE-915 vulnerabilities

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