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Vulnerability details: VCID-3chx-dj2u-kbab
Vulnerability ID VCID-3chx-dj2u-kbab
Aliases CVE-2026-42861
GHSA-6fw7-3q8r-m5vj
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (5)
CWE-284 Improper Access Control
CWE-639 Authorization Bypass Through User-Controlled Key
CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2026-42861
epss 0.0008 https://api.first.org/data/v1/epss?cve=CVE-2026-42861
epss 0.0008 https://api.first.org/data/v1/epss?cve=CVE-2026-42861
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-6fw7-3q8r-m5vj
cvssv4 7.6 https://github.com/FlowiseAI/Flowise
generic_textual HIGH https://github.com/FlowiseAI/Flowise
cvssv4 7.6 https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2
generic_textual HIGH https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2
ssvc Track https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2
cvssv3.1_qr HIGH https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj
cvssv4 7.6 https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj
generic_textual HIGH https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj
ssvc Track https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj
cvssv4 7.6 https://nvd.nist.gov/vuln/detail/CVE-2026-42861
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-42861
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-42861
https://nvd.nist.gov/vuln/detail/CVE-2026-42861
flowise%403.1.2 https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2
GHSA-6fw7-3q8r-m5vj https://github.com/advisories/GHSA-6fw7-3q8r-m5vj
GHSA-6fw7-3q8r-m5vj https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/FlowiseAI/Flowise
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-06-09T15:27:50Z/ Found at https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

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Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-06-09T15:27:50Z/ Found at https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-42861
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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present

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passive

active

high

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Exploit Prediction Scoring System (EPSS)
Percentile 0.19589
EPSS Score 0.00062
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:44:23.754826+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/42xxx/CVE-2026-42861.json 38.6.0