CVE-2026-40159

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Source
https://cve.org/CVERecord?id=CVE-2026-40159
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40159.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40159
Aliases
Published
2026-04-10T16:57:11.623Z
Modified
2026-07-13T16:43:03.837645794Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS Calculator
Summary
PraisonAI Exposes Sensitive Environment Variable via Untrusted MCP Subprocess Execution
Details

PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI’s MCP (Model Context Protocol) integration allows spawning background servers via stdio using user-supplied command strings (e.g., MCP("npx -y @smithery/cli ...")). These commands are executed through Python’s subprocess module. By default, the implementation forwards the entire parent process environment to the spawned subprocess. As a result, any MCP command executed in this manner inherits all environment variables from the host process, including sensitive data such as API keys, authentication tokens, and database credentials. This behavior introduces a security risk when untrusted or third-party commands are used. In common scenarios where MCP tools are invoked via package runners such as npx -y, arbitrary code from external or potentially compromised packages may execute with access to these inherited environment variables. This creates a risk of unintended credential exposure and enables potential supply chain attacks through silent exfiltration of secrets. This vulnerability is fixed in 4.5.128.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-200",
        "CWE-214"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40159.json"
}
References

Affected packages

Git / github.com/mervinpraison/praisonai

Affected ranges

Type
GIT
Repo
https://github.com/mervinpraison/praisonai
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b4e3a8a84ade44ac3dd9102b792cdb4311a95937
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.5.128"
        }
    ],
    "cpe": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*",
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

0.*
0.0.55
0.0.56
0.0.57
0.0.59rc5
2.*
2.0.25
2.0.26
2.0.27
2.0.28
2.0.29
2.0.30
2.0.31
2.0.32
2.0.33
2.0.34
2.0.35
2.0.36
2.0.37
2.0.38
2.0.39
2.0.40
2.0.41
2.0.42
2.0.43
2.0.44
2.0.45
2.0.46
2.0.47
2.0.48
2.0.49
2.0.50
2.0.51
2.0.53
2.0.54
2.0.55
2.0.56
2.0.57
2.0.58
2.0.59
2.0.60
2.0.61
2.0.62
2.0.63
2.0.64
2.0.65
2.0.66
2.0.67
2.0.68
2.0.69
2.0.70
2.0.71
2.0.72
2.0.73
2.0.74
2.0.75
2.0.76
praisonai-cli@0.*
praisonai-cli@0.2.0
praisonai-derive@0.*
praisonai-derive@0.2.0
praisonai@0.*
praisonai@0.2.0
v0.*
v0.0.1
v0.0.18
v0.0.20
v0.0.21
v0.0.22
v0.0.23
v0.0.24
v0.0.25
v0.0.26
v0.0.27
v0.0.28
v0.0.29
v0.0.30
v0.0.31
v0.0.32
v0.0.33
v0.0.34
v0.0.35
v0.0.36
v0.0.37
v0.0.38
v0.0.39
v0.0.40
v0.0.41
v0.0.42
v0.0.43
v0.0.44
v0.0.45
v0.0.46
v0.0.47
v0.0.48
v0.0.49
v0.0.50
v0.0.51
v0.0.52
v0.0.53
v0.0.54
v0.0.58
v0.0.59
v0.0.59rc1
v0.0.59rc11
v0.0.59rc2
v0.0.59rc3
v0.0.59rc4
v0.0.59rc5
v0.0.59rc6
v0.0.59rc7
v0.0.59rc8
v0.0.59rc9
v0.0.61
v0.0.62
v0.0.63
v0.0.64
v0.0.65
v0.0.66
v0.0.67
v0.0.68
v0.0.69
v0.0.70
v0.0.71
v0.0.72
v0.0.73
v0.0.74
v0.1.0
v0.1.1
v0.1.10
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.2.0
v1.*
v1.0.0
v1.0.1
v1.0.10
v1.0.11
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.8
v1.0.9
v2.*
v2.0.0
v2.0.1
v2.0.10
v2.0.13
v2.0.14
v2.0.15
v2.0.16
v2.0.17
v2.0.18
v2.0.19
v2.0.20
v2.0.21
v2.0.22
v2.0.23
v2.0.24
v2.0.4
v2.0.5
v2.0.6
v2.0.7
v2.0.77
v2.0.78
v2.0.79
v2.0.8
v2.0.80
v2.0.81
v2.0.9
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.1.5
v2.1.6
v2.2.0
v2.2.1
v2.2.10
v2.2.11
v2.2.12
v2.2.13
v2.2.14
v2.2.15
v2.2.16
v2.2.17
v2.2.18
v2.2.19
v2.2.2
v2.2.20
v2.2.21
v2.2.22
v2.2.23
v2.2.24
v2.2.25
v2.2.26
v2.2.27
v2.2.28
v2.2.29
v2.2.3
v2.2.30
v2.2.31
v2.2.32
v2.2.33
v2.2.34
v2.2.35
v2.2.36
v2.2.37
v2.2.38
v2.2.39
v2.2.4
v2.2.40
v2.2.41
v2.2.42
v2.2.43
v2.2.44
v2.2.45
v2.2.46
v2.2.47
v2.2.48
v2.2.49
v2.2.5
v2.2.50
v2.2.51
v2.2.52
v2.2.53
v2.2.54
v2.2.55
v2.2.56
v2.2.57
v2.2.58
v2.2.59
v2.2.6
v2.2.60
v2.2.61
v2.2.62
v2.2.63
v2.2.64
v2.2.65
v2.2.66
v2.2.67
v2.2.68
v2.2.69
v2.2.7
v2.2.70
v2.2.71
v2.2.72
v2.2.73
v2.2.74
v2.2.75
v2.2.76
v2.2.77
v2.2.78
v2.2.79
v2.2.8
v2.2.80
v2.2.81
v2.2.82
v2.2.83
v2.2.84
v2.2.85
v2.2.86
v2.2.87
v2.2.89
v2.2.9
v2.2.90
v2.2.91
v2.2.93
v2.2.96
v2.2.97
v2.2.98
v2.2.99
v2.3.0
v2.3.1
v2.3.10
v2.3.11
v2.3.12
v2.3.13
v2.3.14
v2.3.15
v2.3.16
v2.3.18
v2.3.19
v2.3.2
v2.3.20
v2.3.21
v2.3.22
v2.3.23
v2.3.24
v2.3.25
v2.3.26
v2.3.27
v2.3.28
v2.3.29
v2.3.3
v2.3.30
v2.3.31
v2.3.32
v2.3.33
v2.3.34
v2.3.35
v2.3.36
v2.3.37
v2.3.38
v2.3.39
v2.3.4
v2.3.40
v2.3.41
v2.3.42
v2.3.43
v2.3.44
v2.3.45
v2.3.46
v2.3.47
v2.3.48
v2.3.49
v2.3.5
v2.3.50
v2.3.51
v2.3.52
v2.3.53
v2.3.54
v2.3.55
v2.3.56
v2.3.57
v2.3.58
v2.3.59
v2.3.6
v2.3.60
v2.3.61
v2.3.62
v2.3.63
v2.3.64
v2.3.65
v2.3.66
v2.3.67
v2.3.68
v2.3.69
v2.3.7
v2.3.70
v2.3.71
v2.3.72
v2.3.73
v2.3.74
v2.3.75
v2.3.76
v2.3.77
v2.3.78
v2.3.79
v2.3.8
v2.3.80
v2.3.81
v2.3.82
v2.3.83
v2.3.84
v2.3.85
v2.3.86
v2.3.87
v2.3.9
v2.4.0
v2.4.1
v2.4.2
v2.4.3
v2.4.4
v2.5.0
v2.5.2
v2.5.3
v2.5.4
v2.5.5
v2.5.6
v2.5.7
v2.6.0
v2.6.1
v2.6.2
v2.6.3
v2.6.4
v2.6.5
v2.6.6
v2.6.7
v2.6.8
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.7.5
v2.7.6
v2.7.7
v2.7.8
v2.7.9
v2.8.0
v4.*
v4.4.10
v4.4.11
v4.4.12
v4.4.5
v4.4.6
v4.4.7
v4.4.8
v4.4.9
v4.5.0
v4.5.1
v4.5.10
v4.5.100
v4.5.101
v4.5.102
v4.5.103
v4.5.104
v4.5.105
v4.5.106
v4.5.107
v4.5.108
v4.5.109
v4.5.11
v4.5.110
v4.5.111
v4.5.112
v4.5.113
v4.5.115
v4.5.117
v4.5.118
v4.5.119
v4.5.12
v4.5.120
v4.5.121
v4.5.122
v4.5.123
v4.5.124
v4.5.125
v4.5.126
v4.5.13
v4.5.14
v4.5.15
v4.5.16
v4.5.17
v4.5.18
v4.5.19
v4.5.2
v4.5.20
v4.5.21
v4.5.22
v4.5.23
v4.5.24
v4.5.25
v4.5.26
v4.5.27
v4.5.28
v4.5.29
v4.5.3
v4.5.30
v4.5.31
v4.5.32
v4.5.33
v4.5.34
v4.5.35
v4.5.36
v4.5.37
v4.5.38
v4.5.39
v4.5.40
v4.5.41
v4.5.42
v4.5.43
v4.5.44
v4.5.45
v4.5.46
v4.5.48
v4.5.49
v4.5.5
v4.5.51
v4.5.52
v4.5.54
v4.5.55
v4.5.56
v4.5.57
v4.5.58
v4.5.59
v4.5.6
v4.5.60
v4.5.62
v4.5.63
v4.5.64
v4.5.65
v4.5.67
v4.5.68
v4.5.69
v4.5.7
v4.5.70
v4.5.71
v4.5.72
v4.5.73
v4.5.74
v4.5.76
v4.5.77
v4.5.78
v4.5.79
v4.5.8
v4.5.80
v4.5.81
v4.5.82
v4.5.83
v4.5.85
v4.5.87
v4.5.88
v4.5.9
v4.5.90
v4.5.93
v4.5.94
v4.5.95
v4.5.96
v4.5.97
v4.5.98

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40159.json"