CVE-2026-42863 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-42863HIGH

FlowiseAI Flowise — Flowise: Mass Assignment in Chatflow Update Endpoint Allows Cross-Workspace AgentFlow Reassignment

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   N   L   N   H   H   N    7.6   .0027   19.1     —

AFFECTED
  Product  Versions   Fixed
  Flowise  < 3.1.2 –  —

TIMELINE
  Apr 30  Reserved by GitHub_M
  Jun 8   EXPLOIT PUBLISHED — CVE-2026-42863 (FlowiseAI Flowise). Public exploit reference added.
  Jun 8   Published (CNA: GitHub_M)

CWE-284, CWE-639, CWE-915 · CNA: GitHub_M · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, a mass assignment vulnerability exists in the chatflow update endpoint of FlowiseAI. The endpoint allows clients to modify server-controlled properties such as deployed, isPublic, workspaceId, createdDate, and updatedDate when updating a chatflow object. Due to missing server-side validation and authorization checks, an authenticated user can manipulate internal attributes of a chatflow and reassign it to another workspace. This allows cross-workspace resource reassignment and unauthorized modification of deployment and visibility settings. This issue has been patched in version 3.1.2.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 30, 2026	Reserved	Reserved by GitHub_M
June 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-42863 (FlowiseAI Flowise). Public exploit reference added.
June 8, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FlowiseAI	Flowise	—	< 3.1.2	—

Weaknesses

CWE-284 · CWE-639 · CWE-915

References (2)

https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2 [Product, Release Notes]
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-5wxp-qjgq-fx6m [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-42863 at cve.org

Vendors: flowiseai

Weaknesses: CWE-284 · CWE-639 · CWE-915

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-42863 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.