CVE-2026-55443
CVE-2026-55443 · LangChain: Path traversal and sandbox escape in LangChain file-search middleware and loaders
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.
LangChain is a framework for building agents and LLM-powered applications. Prior to 1.3.9, several LangChain components that resolve filesystem paths or expand search patterns do not consistently confine the resolved path to the intended root directory. Affected behaviors include: a file-search agent middleware that validates a starting directory but not the search pattern or the resolved target of matched files, so glob patterns and symlinks can reach files outside the configured root; prompt- and chain/agent-configuration loaders that accept path fields and resolve them without confining the result to a trusted base or rejecting symlink targets; and path-prefix authorization checks that compare by string prefix without a path-segment boundary, so a sibling path sharing the prefix is accepted. When these components receive path values, search patterns, or workspace contents influenced by an untrusted source — including an LLM acting on untrusted input — the result can be disclosure of files outside the intended boundary. This vulnerability is fixed in 1.3.9.
CVSS 5.1 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
langchain
- Versions
- < 1.3.9: Affected
No fix published
langchain-anthropic
- Versions
- < 1.4.6: Affected
No fix published
langchain PyPI
- Versions
- 0.0.1
- 0.0.10
- 0.0.100
- 0.0.101
- 0.0.101rc0
- 0.0.102
- 0.0.102rc0
- 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
- 0.0.146
- 0.0.147
- 0.0.148
- 0.0.149
- 0.0.15
- 0.0.150
- 0.0.151
- 0.0.152
- 0.0.153
- 0.0.154
- 0.0.155
- 0.0.156
- 0.0.157
- 0.0.158
- 0.0.159
- 0.0.16
- 0.0.160
- 0.0.161
- 0.0.162
- 0.0.163
- 0.0.164
- 0.0.165
- 0.0.166
- 0.0.167
- 0.0.168
- 0.0.169
- 0.0.17
- 0.0.170
- 0.0.171
- 0.0.172
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- 0.0.174
- 0.0.175
- 0.0.176
- 0.0.177
- 0.0.178
- 0.0.179
- 0.0.18
- 0.0.180
- 0.0.181
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- 0.0.184
- 0.0.185
- 0.0.186
- 0.0.187
- 0.0.188
- 0.0.189
- 0.0.19
- 0.0.190
- 0.0.191
- 0.0.192
- 0.0.193
- 0.0.194
- 0.0.195
- 0.0.196
- 0.0.197
- 0.0.198
- 0.0.199
- 0.0.2
- 0.0.20
- 0.0.200
- 0.0.201
- 0.0.202
- 0.0.203
- 0.0.204
- 0.0.205
- 0.0.206
- 0.0.207
- 0.0.208
- 0.0.209
- 0.0.21
- 0.0.210
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- 0.0.217
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- 0.0.219
- 0.0.22
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- 0.0.229
- 0.0.23
- 0.0.230
- 0.0.231
- 0.0.232
- 0.0.233
- 0.0.234
- 0.0.235
- 0.0.236
- 0.0.237
- 0.0.238
- 0.0.239
- 0.0.24
- 0.0.240
- 0.0.240rc0
- 0.0.240rc1
- 0.0.240rc4
- 0.0.242
- 0.0.243
- 0.0.244
- 0.0.245
- 0.0.246
- 0.0.247
- 0.0.248
- 0.0.249
- 0.0.25
- 0.0.250
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- 0.0.252
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- 0.0.26
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- 0.0.268
- 0.0.269
- 0.0.27
- 0.0.270
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- 0.0.276
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- 0.0.279
- 0.0.28
- 0.0.281
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- 0.0.284
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- 0.0.286
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- 0.0.289
- 0.0.29
- 0.0.290
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- 0.0.293
- 0.0.294
- 0.0.295
- 0.0.296
- 0.0.297
- 0.0.298
- 0.0.299
- 0.0.3
- 0.0.30
- 0.0.300
- 0.0.301
- 0.0.302
- 0.0.303
- 0.0.304
- 0.0.305
- 0.0.306
- 0.0.307
- 0.0.308
- 0.0.309
- 0.0.31
- 0.0.310
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- 0.0.314
- 0.0.315
- 0.0.316
- 0.0.317
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- 0.0.319
- 0.0.32
- 0.0.320
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- 0.0.323
- 0.0.324
- 0.0.325
- 0.0.326
- 0.0.327
- 0.0.329
- 0.0.33
- 0.0.330
- 0.0.331
- 0.0.331rc0
- 0.0.331rc1
- 0.0.331rc2
- 0.0.331rc3
- 0.0.332
- 0.0.333
- 0.0.334
- 0.0.335
- 0.0.336
- 0.0.337
- 0.0.338
- 0.0.339
- 0.0.339rc0
- 0.0.339rc1
- 0.0.339rc2
- 0.0.339rc3
- 0.0.34
- 0.0.340
- 0.0.341
- 0.0.342
- 0.0.343
- 0.0.344
- 0.0.345
- 0.0.346
- 0.0.347
- 0.0.348
- 0.0.349
- 0.0.349rc1
- 0.0.349rc2
- 0.0.35
- 0.0.350
- 0.0.351
- 0.0.352
- 0.0.353
- 0.0.354
- 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
- 0.0.51
- 0.0.52
- 0.0.53
- 0.0.54
- 0.0.55
- 0.0.56
- 0.0.57
- 0.0.58
- 0.0.59
- 0.0.6
- 0.0.60
- 0.0.61
- 0.0.63
- 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
- 0.0.75
- 0.0.76
- 0.0.77
- 0.0.78
- 0.0.79
- 0.0.8
- 0.0.80
- 0.0.81
- 0.0.82
- 0.0.83
- 0.0.84
- 0.0.85
- 0.0.86
- 0.0.87
- 0.0.88
- 0.0.89
- 0.0.9
- 0.0.90
- 0.0.91
- 0.0.92
- 0.0.93
- 0.0.94
- 0.0.95
- 0.0.96
- 0.0.97
- 0.0.98
- 0.0.99
- 0.0.99rc0
- 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
- 0.1.17rc1
- 0.1.19
- 0.1.2
- 0.1.20
- 0.1.3
- 0.1.4
- 0.1.5
- 0.1.6
- 0.1.7
- 0.1.8
- 0.1.9
- 0.2.0
- 0.2.0rc1
- 0.2.0rc2
- 0.2.1
- 0.2.10
- 0.2.11
- 0.2.12
- 0.2.13
- 0.2.14
- 0.2.15
- 0.2.16
- 0.2.17
- 0.2.2
- 0.2.3
- 0.2.4
- 0.2.5
- 0.2.6
- 0.2.7
- 0.2.8
- 0.2.9
- 0.3.0
- 0.3.0.dev1
- 0.3.0.dev2
- 0.3.1
- 0.3.10
- 0.3.11
- 0.3.12
- 0.3.13
- 0.3.14
- 0.3.15
- 0.3.16
- 0.3.17
- 0.3.18
- 0.3.18rc1
- 0.3.18rc2
- 0.3.19
- 0.3.2
- 0.3.20
- 0.3.21
- 0.3.22
- 0.3.23
- 0.3.24
- 0.3.25
- 0.3.26
- 0.3.27
- 0.3.28
- 0.3.29
- 0.3.3
- 0.3.30
- 0.3.4
- 0.3.5
- 0.3.6
- 0.3.7
- 0.3.8
- 0.3.9
- 0.4.0.dev0
- 1.0.0
- 1.0.0a1
- 1.0.0a10
- 1.0.0a11
- 1.0.0a12
- 1.0.0a13
- 1.0.0a14
- 1.0.0a15
- 1.0.0a2
- 1.0.0a3
- 1.0.0a4
- 1.0.0a5
- 1.0.0a6
- 1.0.0a7
- 1.0.0a8
- 1.0.0a9
- 1.0.0rc1
- 1.0.0rc2
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.1.0
- 1.1.1
- 1.1.2
- 1.1.3
- 1.2.0
Update to 1.3.9
langchain-anthropic PyPI
- Versions
- 0.0.1
- 0.0.1.post1
- 0.0.2
- 0.1.0
- 0.1.1
- 0.1.10
- 0.1.11
- 0.1.12
- 0.1.13
- 0.1.14rc1
- 0.1.14rc2
- 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
- 0.1.3
- 0.1.4
- 0.1.5
- 0.1.6
- 0.1.7
- 0.1.8
- 0.1.8rc1
- 0.1.9
- 0.2.0
- 0.2.0.dev0
- 0.2.0.dev1
- 0.2.1
- 0.2.2
- 0.2.3
- 0.2.4
- 0.3.0
- 0.3.1
- 0.3.10
- 0.3.11
- 0.3.12
- 0.3.13
- 0.3.14
- 0.3.15
- 0.3.16
- 0.3.17
- 0.3.18
- 0.3.19
- 0.3.2
- 0.3.20
- 0.3.21
- 0.3.22
- 0.3.3
- 0.3.4
- 0.3.5
- 0.3.6
- 0.3.7
- 0.3.7rc1
- 0.3.8
- 0.3.9
- 1.0.0
- 1.0.0a1
- 1.0.0a2
- 1.0.0a3
- 1.0.0a4
- 1.0.0a5
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.1.0
- 1.2.0
- 1.3.0
- 1.3.1
- 1.3.2
- 1.3.3
- 1.3.4
- 1.3.5
- 1.4.0
- 1.4.1
- 1.4.2
- 1.4.3
- 1.4.4
- 1.4.5
- Affected ranges
- ECOSYSTEM: < 1.4.6
Update to 1.4.6