Secuno
ENNL
Book demo

CVE-2026-42861

Flowiseai Flowise broken access control

9.6 CRITICALPublic exploitEPSS 0.37%
  1. Published8 Jun 2026

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 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

Flowiseai Flowise< 3.1.2

Remediation

Fixed in
Flowiseai Flowise≥ 3.1.2

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-773669.9
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian…
CVE-2026-1093438.1
SurrealDB before 3.3.0 allows cross-tenant access because the SurrealQL USE statement…
CVE-2026-1093348.1
SurrealDB before 3.3.0 does not check the caller-selected namespace or database against…
CVE-2026-1091868.8
jshERP through 3.6 contains a mass assignment vulnerability in the UserController…
CVE-2026-1054118.1
An Authorization Bypass Through User-Controlled Key vulnerability affecting Tuleap…
CVE-2026-1088538.1
UnicomAI Wanwu before 0.6.3 contains an insecure direct object reference vulnerability…

Frequently asked

Is CVE-2026-42861 being actively exploited?

CVE-2026-42861 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.37%.

How severe is CVE-2026-42861?

CVE-2026-42861 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 0.37% probability of exploitation.

Which products are affected by CVE-2026-42861?

Affected products include Flowiseai Flowise.

How do I fix CVE-2026-42861?

Upgrade affected software to a fixed version, for example Flowiseai Flowise 3.1.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42861 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.