HighVulnerability

CVE-2026-91933: Flowise openai-realtime endpoints allow cross-workspace tool access

Source: NVD(opens in a new tab)
Identifier: CVE-2026-91933
Published: September 15, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.4%

Summary

CVE-2026-91933 affects Flowise before 3.1.4. Its openai-realtime endpoints do not enforce workspace-level authorization checks, so an authenticated user can supply an unscoped chatflowid to reach tools from ChatFlows in other workspaces. Through GET and POST requests, an attacker can retrieve tool definitions, execute tools in victim workspaces, trigger external side effects, and read sensitive tool outputs.

Mitigation

Fixed in 3.1.4.

Details

Scores and exploitation

CVSS score: 7.1(high)
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Attack vector: network
Attack complexity: high
Privileges required: low
User interaction: none
EPSS: 0.4%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 3, 2026.
Disclosure date: September 15, 2026

Weaknesses and techniques

Weakness (CWE): CWE-639

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: Confidentiality,
Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-91933

First tracked: September 15, 2026 at 02:08 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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