CVE-2026-40933

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Source
https://cve.org/CVERecord?id=CVE-2026-40933
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40933.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40933
Aliases
Published
2026-04-21T21:00:35.747Z
Modified
2026-08-07T11:31:17.098885574Z
Severity
  • 9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
Flowise: Authenticated RCE Via MCP Adapters
Details

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, due to unsafe serialization of stdio commands in the MCP adapter, an authenticated attacker can add an MCP stdio server with an arbitrary command, achieving command execution. The vulnerability lies in a bug in the input sanitization from the “Custom MCP” configuration in http://localhost:3000/canvas - where any user can add a new MCP, when doing so - adding a new MCP using stdio, the user can add any command, even though your code have input sanitization checks such as validateCommandInjection and validateArgsForLocalFileAccess, and a list of predefined specific safe commands - these commands, for example "npx" can be combined with code execution arguments ("-c touch /tmp/pwn") that enable direct code execution on the underlying OS. This vulnerability is fixed in 3.1.0.

Database specific 
{
    "cwe_ids": [
        "CWE-78"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40933.json"
}
References

Affected packages

Git / github.com/flowiseai/flowise

Affected ranges

Type
GIT
Repo
https://github.com/flowiseai/flowise
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
378d3ec3bd2d4157d6aa694bbc5ffa50c4159b97
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.1.0"
        }
    ],
    "cpe": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*"
}

Affected versions

flowise-components@1.*
flowise-components@1.0.0
flowise-components@1.1.0
flowise-components@1.1.1
flowise-components@1.2.1
flowise-components@1.2.10
flowise-components@1.2.12
flowise-components@1.2.14
flowise-components@1.2.15
flowise-components@1.2.16
flowise-components@1.2.17
flowise-components@1.2.2
flowise-components@1.2.3
flowise-components@1.2.4
flowise-components@1.2.5
flowise-components@1.2.6
flowise-components@1.2.7
flowise-components@1.2.8
flowise-components@1.2.9
flowise-components@1.3.0
flowise-components@1.3.1
flowise-components@1.3.10
flowise-components@1.3.11
flowise-components@1.3.2
flowise-components@1.3.3
flowise-components@1.3.4
flowise-components@1.3.5
flowise-components@1.3.7
flowise-components@1.3.8
flowise-components@1.3.9
flowise-components@1.4.0
flowise-components@1.4.1
flowise-components@1.4.2
flowise-components@1.4.6
flowise-components@1.4.7
flowise-components@1.4.8
flowise-components@1.4.9
flowise-components@1.5.0
flowise-components@1.5.1
flowise-components@1.5.2
flowise-components@1.5.3
flowise-components@1.6.0
flowise-components@1.6.1
flowise-components@1.6.2
flowise-components@1.6.3
flowise-components@1.6.4
flowise-components@1.6.5
flowise-components@1.6.6
flowise-components@1.6.7
flowise-components@1.6.8
flowise-components@1.7.0
flowise-components@1.7.1
flowise-components@1.7.2
flowise-components@1.8.0
flowise-components@1.8.1
flowise-components@1.8.3
flowise-components@1.8.4
flowise-components@1.8.6
flowise-components@2.*
flowise-components@2.0.2
flowise-components@2.0.3
flowise-components@2.0.4
flowise-components@2.0.5
flowise-components@2.0.6
flowise-components@2.0.7
flowise-components@2.1.0
flowise-components@2.1.1
flowise-components@2.1.2
flowise-components@2.1.3
flowise-components@2.1.4
flowise-components@2.1.5
flowise-components@2.2.0
flowise-components@2.2.1
flowise-components@2.2.2
flowise-components@2.2.3
flowise-components@2.2.4
flowise-components@2.2.5
flowise-components@2.2.6
flowise-components@2.2.7
flowise-components@2.2.7-patch.1
flowise-components@2.2.8
flowise-components@3.*
flowise-components@3.0.0
flowise-components@3.0.1
flowise-components@3.0.10
flowise-components@3.0.11
flowise-components@3.0.12
flowise-components@3.0.13
flowise-components@3.0.2
flowise-components@3.0.3
flowise-components@3.0.4
flowise-components@3.0.5
flowise-components@3.0.6
flowise-components@3.0.7
flowise-components@3.0.8
flowise-components@3.0.9
flowise-ui@1.*
flowise-ui@1.0.0
flowise-ui@1.1.0
flowise-ui@1.2.0
flowise-ui@1.2.1
flowise-ui@1.2.10
flowise-ui@1.2.12
flowise-ui@1.2.13
flowise-ui@1.2.14
flowise-ui@1.2.15
flowise-ui@1.2.2
flowise-ui@1.2.3
flowise-ui@1.2.4
flowise-ui@1.2.5
flowise-ui@1.2.6
flowise-ui@1.2.7
flowise-ui@1.3.0
flowise-ui@1.3.1
flowise-ui@1.3.2
flowise-ui@1.3.3
flowise-ui@1.3.4
flowise-ui@1.3.5
flowise-ui@1.3.6
flowise-ui@1.3.7
flowise-ui@1.4.0
flowise-ui@1.4.2
flowise-ui@1.4.3
flowise-ui@1.4.4
flowise-ui@1.4.5
flowise-ui@1.4.6
flowise-ui@1.4.7
flowise-ui@1.4.8
flowise-ui@1.4.9
flowise-ui@1.5.0
flowise-ui@1.5.1
flowise-ui@1.6.0
flowise-ui@1.6.1
flowise-ui@1.6.2
flowise-ui@1.6.3
flowise-ui@1.6.4
flowise-ui@1.6.5
flowise-ui@1.6.6
flowise-ui@1.7.0
flowise-ui@1.7.1
flowise-ui@1.7.2
flowise-ui@1.8.0
flowise-ui@1.8.1
flowise-ui@1.8.2
flowise-ui@1.8.3
flowise-ui@1.8.4
flowise-ui@2.*
flowise-ui@2.0.2
flowise-ui@2.0.3
flowise-ui@2.0.4
flowise-ui@2.0.5
flowise-ui@2.0.6
flowise-ui@2.0.7
flowise-ui@2.1.0
flowise-ui@2.1.1
flowise-ui@2.1.2
flowise-ui@2.1.3
flowise-ui@2.1.4
flowise-ui@2.1.5
flowise-ui@2.2.0
flowise-ui@2.2.1
flowise-ui@2.2.2
flowise-ui@2.2.3
flowise-ui@2.2.4
flowise-ui@2.2.5
flowise-ui@2.2.6
flowise-ui@2.2.7
flowise-ui@2.2.7-patch.1
flowise-ui@2.2.8
flowise-ui@3.*
flowise-ui@3.0.0
flowise-ui@3.0.1
flowise-ui@3.0.10
flowise-ui@3.0.11
flowise-ui@3.0.12
flowise-ui@3.0.13
flowise-ui@3.0.2
flowise-ui@3.0.3
flowise-ui@3.0.4
flowise-ui@3.0.5
flowise-ui@3.0.6
flowise-ui@3.0.7
flowise-ui@3.0.8
flowise-ui@3.0.9
flowise@1.*
flowise@1.0.0
flowise@1.0.1
flowise@1.1.0
flowise@1.1.1
flowise@1.2.1
flowise@1.2.11
flowise@1.2.13
flowise@1.2.14
flowise@1.2.15
flowise@1.2.16
flowise@1.2.2
flowise@1.2.3
flowise@1.2.4
flowise@1.2.5
flowise@1.2.6
flowise@1.2.7
flowise@1.2.8
flowise@1.2.9
flowise@1.3.0
flowise@1.3.1
flowise@1.3.2
flowise@1.3.3
flowise@1.3.4
flowise@1.3.5
flowise@1.3.6
flowise@1.3.7
flowise@1.3.8
flowise@1.3.9
flowise@1.4.0
flowise@1.4.1
flowise@1.4.10
flowise@1.4.11
flowise@1.4.12
flowise@1.4.2
flowise@1.4.4
flowise@1.4.5
flowise@1.4.6
flowise@1.4.7
flowise@1.4.8
flowise@1.4.9
flowise@1.5.0
flowise@1.5.1
flowise@1.6.0
flowise@1.6.1
flowise@1.6.2
flowise@1.6.3
flowise@1.6.4
flowise@1.6.5
flowise@1.6.6
flowise@1.7.0
flowise@1.7.1
flowise@1.7.2
flowise@1.8.0
flowise@1.8.1
flowise@1.8.2
flowise@1.8.3
flowise@1.8.4
flowise@2.*
flowise@2.0.2
flowise@2.0.3
flowise@2.0.4
flowise@2.0.5
flowise@2.0.6
flowise@2.0.7
flowise@2.1.0
flowise@2.1.1
flowise@2.1.2
flowise@2.1.3
flowise@2.1.4
flowise@2.1.5
flowise@2.2.0
flowise@2.2.1
flowise@2.2.2
flowise@2.2.3
flowise@2.2.4
flowise@2.2.5
flowise@2.2.6
flowise@2.2.6-hotfix.1
flowise@2.2.7
flowise@2.2.7-patch.1
flowise@2.2.8
flowise@3.*
flowise@3.0.0
flowise@3.0.1
flowise@3.0.10
flowise@3.0.11
flowise@3.0.12
flowise@3.0.13
flowise@3.0.2
flowise@3.0.3
flowise@3.0.4
flowise@3.0.5
flowise@3.0.6
flowise@3.0.7
flowise@3.0.8
flowise@3.0.9
Other
pre-langchain-v1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40933.json"