{"id":"CVE-2026-42861","aliases":["GHSA-6fw7-3q8r-m5vj"],"url":"https://o3.security/vulnerability/CVE-2026-42861","summary":"Flowise: Mass Assignment in Variable Update Endpoint Allows Cross-Workspace Resource Reassignment","details":"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 variable update endpoint of FlowiseAI. The endpoint allows authenticated users to modify server-controlled properties such as workspaceId, createdDate, and updatedDate when updating a variable resource. Due to missing server-side validation and authorization checks, an attacker can manipulate the workspaceId field and reassign variables to arbitrary workspaces. This behavior may break tenant isolation in multi-workspace environments. This issue has been patched in version 3.1.2.","published":"2026-06-08T15:25:47.669Z","modified":"2026-08-12T03:51:43.028521571Z","cvss":null,"epss":{"score":0.00254,"percentile":0.16631,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"flowise","fixedVersion":"3.1.2"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42861.json"},{"type":"ADVISORY","url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42861"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:43.028521571Z"}}