CVE-2026-40289
CVE-2026-40289 · PraisonAI Browser Server allows unauthenticated WebSocket clients to hijack connected extension sessions
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
PraisonAI is a multi-agent teams system. In versions below 4.5.139 of PraisonAI and 1.5.140 of praisonaiagents, the browser bridge (praisonai browser start) is vulnerable to unauthenticated remote session hijacking due to missing authentication and a bypassable origin check on its /ws WebSocket endpoint. The server binds to 0.0.0.0 by default and only validates the Origin header when one is present, meaning any non-browser client that omits the header is accepted without restriction. An unauthenticated network attacker can connect, send a start_session message, and the server will route it to the first idle browser-extension WebSocket (effectively hijacking that session) and then broadcast all resulting automation actions and outputs back to the attacker. This enables unauthorized remote control of connected browser automation sessions, leakage of sensitive page context and automation results, and misuse of model-backed browser actions in any environment where the bridge is network-reachable. This issue has been fixed in versions 4.5.139 of PraisonAI and 1.5.140 of praisonaiagents.
CVSS 9.1 · Critical · EPSS 0.4% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
praisonai
- Versions
- < 4.5.139: Affected
No fix published
praisonaiagents
- Versions
- < 1.5.140: Affected
No fix published
praisonaiagents PyPI
- Versions
- 0.0.1
- 0.0.10
- 0.0.100
- 0.0.101
- 0.0.102
- 0.0.103
- 0.0.104
- 0.0.105
- 0.0.106
- 0.0.107
- 0.0.108
- 0.0.109
- 0.0.11
- 0.0.110
- 0.0.111
- 0.0.112
- 0.0.113
- 0.0.114
- 0.0.115
- 0.0.116
- 0.0.117
- 0.0.118
- 0.0.119
- 0.0.12
- 0.0.120
- 0.0.121
- 0.0.122
- 0.0.123
- 0.0.124
- 0.0.125
- 0.0.126
- 0.0.127
- 0.0.128
- 0.0.129
- 0.0.13
- 0.0.130
- 0.0.131
- 0.0.132
- 0.0.133
- 0.0.134
- 0.0.135
- 0.0.136
- 0.0.137
- 0.0.138
- 0.0.139
- 0.0.14
- 0.0.140
- 0.0.141
- 0.0.142
- 0.0.143
- 0.0.144
- 0.0.145
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- 0.0.16
- 0.0.160
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- 0.0.2
- 0.0.20
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- 0.0.3
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- 0.0.41
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- 0.0.7
- 0.0.70
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- 0.0.8
- 0.0.80
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- 0.0.98
- 0.0.99
- 0.1.0
- 0.1.1
- 0.1.10
- 0.1.11
- 0.1.12
- 0.1.13
- 0.1.14
- 0.1.15
- 0.1.16
- 0.1.17
- 0.1.18
- 0.1.19
- 0.1.2
- 0.1.20
- 0.1.21
- 0.1.22
- 0.1.23
- 0.1.24
- 0.1.25
- 0.1.26
- 0.1.27
- 0.1.3
- 0.1.4
- 0.1.5
- 0.1.6
- 0.1.7
- 0.1.8
- 0.1.9
- 0.10.0
- 0.10.1
- 0.10.10
- 0.10.2
- 0.10.3
- 0.10.4
- 0.10.5
- 0.10.6
- 0.10.7
- 0.10.8
- 0.10.9
- 0.11.0
- 0.11.1
- 0.11.10
- 0.11.11
- 0.11.12
- 0.11.13
- 0.11.14
- 0.11.15
- 0.11.16
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- 0.11.2
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- 0.11.9
- 0.12.0
- 0.12.1
- 0.12.10
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- 0.13.2
- 0.13.20
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- 0.13.23
- 0.13.3
- 0.13.4
- 0.13.5
- 0.13.6
- 0.13.7
- 0.13.8
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- 0.14.0
- 0.14.1
- 0.14.10
- 0.14.11
- 0.14.12
- 0.14.14
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- 0.14.16
- 0.14.2
- 0.14.3
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- 0.14.5
- 0.14.6
- 0.14.7
- 0.14.8
- 0.14.9
- 0.15.0
- 0.15.1
- 0.15.2
- 0.15.3
- 0.2.0
- 0.2.1
- 0.2.2
- 0.3.0
- 0.3.1
- 0.3.2
- 0.3.3
- 0.3.4
- 0.4.0
- 0.4.1
- 0.5.0
- 0.5.1
- 0.5.2
- 0.5.3
- 0.6.0
- 0.6.1
- 0.6.2
- 0.6.3
- 0.6.4
- 0.6.5
- 0.6.6
- 0.6.7
- 0.6.8
- 0.7.0
- 0.7.1
- 0.8.0
- 0.8.1
- 0.9.0
- 0.9.1
- 1.0.0
- 1.1.0
- 1.2.0
- 1.2.1
- 1.2.2
- 1.2.3
- 1.2.4
- 1.3.0
- 1.3.1
- 1.4.0
- 1.4.1
- 1.4.2
- 1.4.3
- 1.4.4
- 1.4.5
- 1.4.6
- 1.4.7
- 1.4.8
- 1.5.0
- 1.5.1
- 1.5.10
- 1.5.100
- 1.5.101
- 1.5.102
- 1.5.103
- 1.5.104
- 1.5.105
- 1.5.106
- 1.5.107
- 1.5.108
- 1.5.109
- 1.5.11
- 1.5.110
- 1.5.111
- 1.5.112
- 1.5.113
- 1.5.114
- 1.5.115
- 1.5.116
- 1.5.117
- 1.5.118
- 1.5.119
- 1.5.12
- 1.5.120
- 1.5.121
- 1.5.122
- 1.5.123
- 1.5.124
- 1.5.125
- 1.5.126
- 1.5.127
- 1.5.128
- 1.5.129
- 1.5.13
- 1.5.130
- 1.5.131
- 1.5.132
- 1.5.133
- 1.5.134
- 1.5.135
- 1.5.136
- 1.5.137
- 1.5.138
- 1.5.139
- 1.5.14
- 1.5.15
- 1.5.16
- 1.5.17
- 1.5.18
- 1.5.19
- 1.5.2
- 1.5.20
- 1.5.21
- 1.5.22
- 1.5.23
- 1.5.24
- 1.5.25
- 1.5.26
- 1.5.27
- 1.5.28
- 1.5.29
- 1.5.3
- 1.5.30
- 1.5.31
- 1.5.32
- 1.5.33
- 1.5.34
- 1.5.35
- 1.5.36
- 1.5.37
- 1.5.38
- 1.5.39
- 1.5.40
- 1.5.41
- 1.5.42
- 1.5.43
- 1.5.44
- 1.5.45
- 1.5.46
- 1.5.47
- 1.5.48
- 1.5.49
- 1.5.5
- 1.5.50
- 1.5.51
- 1.5.52
- 1.5.53
- 1.5.54
- 1.5.55
- 1.5.56
- 1.5.57
- 1.5.58
- 1.5.59
- 1.5.6
- 1.5.60
- 1.5.61
- 1.5.62
- 1.5.63
- 1.5.64
- 1.5.65
- 1.5.66
- 1.5.67
- 1.5.68
- 1.5.69
- 1.5.7
- 1.5.70
- 1.5.71
- 1.5.72
- 1.5.73
- 1.5.74
- 1.5.75
- 1.5.76
- 1.5.77
- 1.5.78
- 1.5.79
Update to 1.5.140
praisonai PyPI
- Versions
- 0.0.1
- 0.0.10
- 0.0.11
- 0.0.12
- 0.0.13
- 0.0.14
- 0.0.15
- 0.0.16
- 0.0.17
- 0.0.18
- 0.0.19
- 0.0.2
- 0.0.20
- 0.0.21
- 0.0.22
- 0.0.23
- 0.0.24
- 0.0.25
- 0.0.26
- 0.0.27
- 0.0.28
- 0.0.29
- 0.0.3
- 0.0.30
- 0.0.31
- 0.0.32
- 0.0.33
- 0.0.34
- 0.0.35
- 0.0.36
- 0.0.37
- 0.0.38
- 0.0.39
- 0.0.4
- 0.0.40
- 0.0.41
- 0.0.42
- 0.0.43
- 0.0.44
- 0.0.45
- 0.0.46
- 0.0.47
- 0.0.48
- 0.0.49
- 0.0.5
- 0.0.50
- 0.0.52
- 0.0.53
- 0.0.54
- 0.0.55
- 0.0.56
- 0.0.57
- 0.0.58
- 0.0.59
- 0.0.59rc11
- 0.0.59rc2
- 0.0.59rc3
- 0.0.59rc5
- 0.0.59rc6
- 0.0.59rc7
- 0.0.59rc8
- 0.0.59rc9
- 0.0.6
- 0.0.61
- 0.0.64
- 0.0.65
- 0.0.66
- 0.0.67
- 0.0.68
- 0.0.69
- 0.0.7
- 0.0.70
- 0.0.71
- 0.0.72
- 0.0.73
- 0.0.74
- 0.0.8
- 0.0.9
- 0.1.0
- 0.1.1
- 0.1.10
- 0.1.2
- 0.1.3
- 0.1.4
- 0.1.5
- 0.1.6
- 0.1.7
- 0.1.8
- 0.1.9
- 1.0.0
- 1.0.1
- 1.0.10
- 1.0.11
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.8
- 1.0.9
- 2.0.0
- 2.0.1
- 2.0.10
- 2.0.11
- 2.0.12
- 2.0.13
- 2.0.14
- 2.0.15
- 2.0.16
- 2.0.17
- 2.0.18
- 2.0.19
- 2.0.2
- 2.0.20
- 2.0.22
- 2.0.23
- 2.0.24
- 2.0.25
- 2.0.26
- 2.0.27
- 2.0.28
- 2.0.29
- 2.0.3
- 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
- 2.0.5
- 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
- 2.0.6
- 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
- 2.0.7
- 2.0.70
- 2.0.71
- 2.0.72
- 2.0.73
- 2.0.74
- 2.0.75
- 2.0.76
- 2.0.77
- 2.0.78
- 2.0.79
- 2.0.8
- 2.0.80
- 2.0.81
- 2.0.9
- 2.1.0
- 2.1.1
- 2.1.4
- 2.1.5
- 2.1.6
- 2.2.1
- 2.2.10
- 2.2.11
- 2.2.12
- 2.2.13
- 2.2.14
- 2.2.15
- 2.2.16
- 2.2.17
- 2.2.18
- 2.2.19
- 2.2.2
- 2.2.20
- 2.2.21
- 2.2.22
- 2.2.24
- 2.2.25
- 2.2.26
- 2.2.27
- 2.2.28
- 2.2.29
- 2.2.3
- 2.2.30
- 2.2.31
- 2.2.32
- 2.2.33
- 2.2.34
- 2.2.35
- 2.2.36
- 2.2.37
- 2.2.38
- 2.2.39
- 2.2.4
- 2.2.40
- 2.2.41
- 2.2.42
- 2.2.43
- 2.2.44
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- 2.2.46
- 2.2.47
- 2.2.48
- 2.2.49
- 2.2.5
- 2.2.50
- 2.2.51
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- 2.2.53
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- 2.2.55
- 2.2.56
- 2.2.57
- 2.2.58
- 2.2.59
- 2.2.6
- 2.2.60
- 2.2.61
- 2.2.62
- 2.2.63
- 2.2.64
- 2.2.65
- 2.2.66
- 2.2.67
- 2.2.68
- 2.2.69
- 2.2.7
- 2.2.70
- 2.2.71
- 2.2.72
- 2.2.73
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- 2.2.76
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- 2.2.78
- 2.2.79
- 2.2.8
- 2.2.80
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- 2.2.84
- 2.2.86
- 2.2.87
- 2.2.88
- 2.2.89
- 2.2.9
- 2.2.90
- 2.2.91
- 2.2.93
- 2.2.95
- 2.2.96
- 2.2.97
- 2.2.98
- 2.2.99
- 2.3.0
- 2.3.1
- 2.3.10
- 2.3.11
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- 2.3.13
- 2.3.14
- 2.3.15
- 2.3.16
- 2.3.18
- 2.3.19
- 2.3.2
- 2.3.20
- 2.3.21
- 2.3.22
- 2.3.23
- 2.3.24
- 2.3.25
- 2.3.26
- 2.3.27
- 2.3.28
- 2.3.29
- 2.3.3
- 2.3.30
- 2.3.31
- 2.3.32
- 2.3.33
- 2.3.34
- 2.3.35
- 2.3.36
- 2.3.37
- 2.3.38
- 2.3.39
- 2.3.4
- 2.3.40
- 2.3.41
- 2.3.42
- 2.3.43
- 2.3.44
- 2.3.45
- 2.3.46
- 2.3.47
- 2.3.48
- 2.3.49
- 2.3.5
- 2.3.50
- 2.3.51
- 2.3.52
- 2.3.53
- 2.3.54
- 2.3.55
- 2.3.56
- 2.3.57
- 2.3.58
- 2.3.59
- 2.3.6
- 2.3.60
- 2.3.61
- 2.3.62
- 2.3.63
- 2.3.64
- 2.3.65
- 2.3.66
- 2.3.67
- 2.3.68
- 2.3.69
- 2.3.7
- 2.3.70
- 2.3.71
- 2.3.72
- 2.3.73
- 2.3.74
- 2.3.75
- 2.3.76
- 2.3.77
- 2.3.78
- 2.3.79
- 2.3.8
- 2.3.80
- 2.3.81
- 2.3.82
- 2.3.83
- 2.3.84
- 2.3.85
- 2.3.86
- 2.3.87
- 2.3.9
- 2.4.0
- 2.4.1
- 2.4.2
- 2.4.3
- 2.4.4
- 2.5.0
- 2.5.1
- 2.5.2
- 2.5.3
- 2.5.4
- 2.5.5
- 2.5.6
- 2.5.7
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.6.7
- 2.6.8
- 2.7.0
- 2.8.3
- 2.8.4
- 2.8.5
- 2.8.6
- 2.8.7
- 2.8.8
- 2.8.9
- 2.9.0
- 2.9.1
- 2.9.2
- 3.0.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.1.0
- 3.1.1
- 3.1.2
- 3.1.3
- 3.1.4
- 3.1.5
- 3.1.6
- 3.1.7
- 3.1.8
- 3.1.9
- 3.10.0
- 3.10.1
- 3.10.10
- 3.10.11
- 3.10.12
- 3.10.13
- 3.10.14
- 3.10.15
- 3.10.16
- 3.10.17
- 3.10.18
- 3.10.19
- 3.10.2
- 3.10.20
- 3.10.21
- 3.10.22
- 3.10.23
- 3.10.24
- 3.10.25
- 3.10.26
- 3.10.27
- 3.10.3
- 3.10.4
- 3.10.5
- 3.10.6
- 3.10.7
- 3.10.8
- 3.10.9
- 3.11.0
- 3.11.1
- 3.11.10
- 3.11.11
- 3.11.12
- 3.11.13
- 3.11.14
- 3.11.2
- 3.11.3
- 3.11.4
- 3.11.8
- 3.11.9
- 3.12.0
- 3.12.1
- 3.12.2
- 3.12.3
- 3.2.0
- 3.2.1
- 3.3.0
- 3.3.1
- 3.4.0
- 3.4.1
- 3.5.0
- 3.5.1
- 3.5.2
- 3.5.3
- 3.5.4
- 3.5.5
- 3.5.6
- 3.5.7
- 3.5.8
- 3.5.9
- 3.6.0
- 3.6.1
- 3.6.2
- 3.7.0
- 3.7.1
- 3.7.2
- 3.7.3
- 3.7.4
- 3.7.5
- 3.7.6
- 3.7.7
- 3.7.8
- 3.7.9
- 3.8.0
- 3.8.1
- 3.8.10
- 3.8.11
- 3.8.12
- 3.8.13
- 3.8.14
- 3.8.16
- 3.8.17
- 3.8.18
- 3.8.19
- 3.8.2
- 3.8.20
- 3.8.21
- 3.8.22
- 3.8.3
- 3.8.4
- 3.8.5
- 3.8.6
- 3.8.7
- 3.8.8
- 3.8.9
- 3.9.0
- 3.9.1
- 3.9.10
- 3.9.11
- 3.9.12
- 3.9.13
- 3.9.14
- 3.9.15
- 3.9.16
- 3.9.17
- 3.9.18
Update to 4.5.139