CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-56274

Flowise before 3.1.2 contains multiple OS command injection vulnerabilities in the Custom MCP Server feature due to incomplete command-flag validation and a regex bypass in local file access restrictions. An attacker with a Flowise account of any role, or API access with view/update permissions for chatflows, can configure a malicious MCP server to bypass the validateCommandFlags blocklist (for example, 'docker build' is not blocked, and 'npx --yes' is not blocked while only '-y' is) and the validateArgsForLocalFileAccess checks, resulting in execution of arbitrary commands on the Flowise host.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.017

EPSS Ranking 73.7%

CVSS Severity

CVSS v3 Score 9.9

References

Products affected by CVE-2026-56274

Flowiseai » Flowise » Version: N/A

cpe:2.3:a:flowiseai:flowise:-
Flowiseai » Flowise » Version: 1.0.0

cpe:2.3:a:flowiseai:flowise:1.0.0
Flowiseai » Flowise » Version: 1.0.1

cpe:2.3:a:flowiseai:flowise:1.0.1
Flowiseai » Flowise » Version: 1.1.0

cpe:2.3:a:flowiseai:flowise:1.1.0
Flowiseai » Flowise » Version: 1.1.1

cpe:2.3:a:flowiseai:flowise:1.1.1
Flowiseai » Flowise » Version: 1.2.1

cpe:2.3:a:flowiseai:flowise:1.2.1
Flowiseai » Flowise » Version: 1.2.10

cpe:2.3:a:flowiseai:flowise:1.2.10
Flowiseai » Flowise » Version: 1.2.11

cpe:2.3:a:flowiseai:flowise:1.2.11
Flowiseai » Flowise » Version: 1.2.12

cpe:2.3:a:flowiseai:flowise:1.2.12
Flowiseai » Flowise » Version: 1.2.13

cpe:2.3:a:flowiseai:flowise:1.2.13
Flowiseai » Flowise » Version: 1.2.14

cpe:2.3:a:flowiseai:flowise:1.2.14
Flowiseai » Flowise » Version: 1.2.15

cpe:2.3:a:flowiseai:flowise:1.2.15
Flowiseai » Flowise » Version: 1.2.16

cpe:2.3:a:flowiseai:flowise:1.2.16
Flowiseai » Flowise » Version: 1.2.2

cpe:2.3:a:flowiseai:flowise:1.2.2
Flowiseai » Flowise » Version: 1.2.3

cpe:2.3:a:flowiseai:flowise:1.2.3
Flowiseai » Flowise » Version: 1.2.4

cpe:2.3:a:flowiseai:flowise:1.2.4
Flowiseai » Flowise » Version: 1.2.5

cpe:2.3:a:flowiseai:flowise:1.2.5
Flowiseai » Flowise » Version: 1.2.6

cpe:2.3:a:flowiseai:flowise:1.2.6
Flowiseai » Flowise » Version: 1.2.7

cpe:2.3:a:flowiseai:flowise:1.2.7
Flowiseai » Flowise » Version: 1.2.8

cpe:2.3:a:flowiseai:flowise:1.2.8
Flowiseai » Flowise » Version: 1.2.9

cpe:2.3:a:flowiseai:flowise:1.2.9
Flowiseai » Flowise » Version: 1.3.0

cpe:2.3:a:flowiseai:flowise:1.3.0
Flowiseai » Flowise » Version: 1.3.1

cpe:2.3:a:flowiseai:flowise:1.3.1
Flowiseai » Flowise » Version: 1.3.2

cpe:2.3:a:flowiseai:flowise:1.3.2
Flowiseai » Flowise » Version: 1.3.3

cpe:2.3:a:flowiseai:flowise:1.3.3
Flowiseai » Flowise » Version: 1.3.4

cpe:2.3:a:flowiseai:flowise:1.3.4
Flowiseai » Flowise » Version: 1.3.5

cpe:2.3:a:flowiseai:flowise:1.3.5
Flowiseai » Flowise » Version: 1.3.6

cpe:2.3:a:flowiseai:flowise:1.3.6
Flowiseai » Flowise » Version: 1.3.7

cpe:2.3:a:flowiseai:flowise:1.3.7
Flowiseai » Flowise » Version: 1.3.8

cpe:2.3:a:flowiseai:flowise:1.3.8
Flowiseai » Flowise » Version: 1.3.9

cpe:2.3:a:flowiseai:flowise:1.3.9
Flowiseai » Flowise » Version: 1.4.0

cpe:2.3:a:flowiseai:flowise:1.4.0
Flowiseai » Flowise » Version: 1.4.1

cpe:2.3:a:flowiseai:flowise:1.4.1
Flowiseai » Flowise » Version: 1.4.10

cpe:2.3:a:flowiseai:flowise:1.4.10
Flowiseai » Flowise » Version: 1.4.11

cpe:2.3:a:flowiseai:flowise:1.4.11
Flowiseai » Flowise » Version: 1.4.12

cpe:2.3:a:flowiseai:flowise:1.4.12
Flowiseai » Flowise » Version: 1.4.2

cpe:2.3:a:flowiseai:flowise:1.4.2
Flowiseai » Flowise » Version: 1.4.3

cpe:2.3:a:flowiseai:flowise:1.4.3
Flowiseai » Flowise » Version: 1.4.4

cpe:2.3:a:flowiseai:flowise:1.4.4
Flowiseai » Flowise » Version: 1.4.5

cpe:2.3:a:flowiseai:flowise:1.4.5
Flowiseai » Flowise » Version: 1.4.6

cpe:2.3:a:flowiseai:flowise:1.4.6
Flowiseai » Flowise » Version: 1.4.7

cpe:2.3:a:flowiseai:flowise:1.4.7
Flowiseai » Flowise » Version: 1.4.8

cpe:2.3:a:flowiseai:flowise:1.4.8
Flowiseai » Flowise » Version: 1.4.9

cpe:2.3:a:flowiseai:flowise:1.4.9
Flowiseai » Flowise » Version: 1.5.0

cpe:2.3:a:flowiseai:flowise:1.5.0
Flowiseai » Flowise » Version: 1.5.1

cpe:2.3:a:flowiseai:flowise:1.5.1
Flowiseai » Flowise » Version: 1.6.0

cpe:2.3:a:flowiseai:flowise:1.6.0
Flowiseai » Flowise » Version: 1.6.1

cpe:2.3:a:flowiseai:flowise:1.6.1
Flowiseai » Flowise » Version: 1.6.2

cpe:2.3:a:flowiseai:flowise:1.6.2
Flowiseai » Flowise » Version: 1.6.3

cpe:2.3:a:flowiseai:flowise:1.6.3
Flowiseai » Flowise » Version: 1.6.4

cpe:2.3:a:flowiseai:flowise:1.6.4
Flowiseai » Flowise » Version: 1.6.5

cpe:2.3:a:flowiseai:flowise:1.6.5
Flowiseai » Flowise » Version: 1.6.6

cpe:2.3:a:flowiseai:flowise:1.6.6
Flowiseai » Flowise » Version: 1.7.0

cpe:2.3:a:flowiseai:flowise:1.7.0
Flowiseai » Flowise » Version: 1.7.1

cpe:2.3:a:flowiseai:flowise:1.7.1
Flowiseai » Flowise » Version: 1.7.2

cpe:2.3:a:flowiseai:flowise:1.7.2
Flowiseai » Flowise » Version: 1.8.0

cpe:2.3:a:flowiseai:flowise:1.8.0
Flowiseai » Flowise » Version: 1.8.1

cpe:2.3:a:flowiseai:flowise:1.8.1
Flowiseai » Flowise » Version: 1.8.2

cpe:2.3:a:flowiseai:flowise:1.8.2
Flowiseai » Flowise » Version: 1.8.3

cpe:2.3:a:flowiseai:flowise:1.8.3
Flowiseai » Flowise » Version: 1.8.4

cpe:2.3:a:flowiseai:flowise:1.8.4
Flowiseai » Flowise » Version: 2.0.0

cpe:2.3:a:flowiseai:flowise:2.0.0
Flowiseai » Flowise » Version: 2.0.1

cpe:2.3:a:flowiseai:flowise:2.0.1
Flowiseai » Flowise » Version: 2.0.2

cpe:2.3:a:flowiseai:flowise:2.0.2
Flowiseai » Flowise » Version: 2.0.3

cpe:2.3:a:flowiseai:flowise:2.0.3
Flowiseai » Flowise » Version: 2.0.4

cpe:2.3:a:flowiseai:flowise:2.0.4
Flowiseai » Flowise » Version: 2.0.5

cpe:2.3:a:flowiseai:flowise:2.0.5
Flowiseai » Flowise » Version: 2.0.6

cpe:2.3:a:flowiseai:flowise:2.0.6
Flowiseai » Flowise » Version: 2.0.7

cpe:2.3:a:flowiseai:flowise:2.0.7
Flowiseai » Flowise » Version: 2.1.0

cpe:2.3:a:flowiseai:flowise:2.1.0
Flowiseai » Flowise » Version: 2.1.1

cpe:2.3:a:flowiseai:flowise:2.1.1
Flowiseai » Flowise » Version: 2.1.2

cpe:2.3:a:flowiseai:flowise:2.1.2
Flowiseai » Flowise » Version: 2.1.3

cpe:2.3:a:flowiseai:flowise:2.1.3
Flowiseai » Flowise » Version: 2.1.4

cpe:2.3:a:flowiseai:flowise:2.1.4
Flowiseai » Flowise » Version: 2.1.5

cpe:2.3:a:flowiseai:flowise:2.1.5
Flowiseai » Flowise » Version: 2.2.0

cpe:2.3:a:flowiseai:flowise:2.2.0
Flowiseai » Flowise » Version: 2.2.1

cpe:2.3:a:flowiseai:flowise:2.2.1
Flowiseai » Flowise » Version: 2.2.2

cpe:2.3:a:flowiseai:flowise:2.2.2
Flowiseai » Flowise » Version: 2.2.3

cpe:2.3:a:flowiseai:flowise:2.2.3
Flowiseai » Flowise » Version: 2.2.4

cpe:2.3:a:flowiseai:flowise:2.2.4
Flowiseai » Flowise » Version: 2.2.5

cpe:2.3:a:flowiseai:flowise:2.2.5
Flowiseai » Flowise » Version: 2.2.6

cpe:2.3:a:flowiseai:flowise:2.2.6
Flowiseai » Flowise » Version: 2.2.7

cpe:2.3:a:flowiseai:flowise:2.2.7
Flowiseai » Flowise » Version: 2.2.8

cpe:2.3:a:flowiseai:flowise:2.2.8
Flowiseai » Flowise » Version: 3.0.0

cpe:2.3:a:flowiseai:flowise:3.0.0
Flowiseai » Flowise » Version: 3.0.1

cpe:2.3:a:flowiseai:flowise:3.0.1
Flowiseai » Flowise » Version: 3.0.10

cpe:2.3:a:flowiseai:flowise:3.0.10
Flowiseai » Flowise » Version: 3.0.11

cpe:2.3:a:flowiseai:flowise:3.0.11
Flowiseai » Flowise » Version: 3.0.12

cpe:2.3:a:flowiseai:flowise:3.0.12
Flowiseai » Flowise » Version: 3.0.13

cpe:2.3:a:flowiseai:flowise:3.0.13
Flowiseai » Flowise » Version: 3.0.2

cpe:2.3:a:flowiseai:flowise:3.0.2
Flowiseai » Flowise » Version: 3.0.3

cpe:2.3:a:flowiseai:flowise:3.0.3
Flowiseai » Flowise » Version: 3.0.4

cpe:2.3:a:flowiseai:flowise:3.0.4
Flowiseai » Flowise » Version: 3.0.5

cpe:2.3:a:flowiseai:flowise:3.0.5
Flowiseai » Flowise » Version: 3.0.6

cpe:2.3:a:flowiseai:flowise:3.0.6
Flowiseai » Flowise » Version: 3.0.7

cpe:2.3:a:flowiseai:flowise:3.0.7
Flowiseai » Flowise » Version: 3.0.8

cpe:2.3:a:flowiseai:flowise:3.0.8
Flowiseai » Flowise » Version: 3.0.9

cpe:2.3:a:flowiseai:flowise:3.0.9

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-56274

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