CVE-2026-55446
CVE-2026-55446 · Langflow: Unauthenticated DoS through multipart form boundary file upload
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.0.19, an attacker can send a /api/v1/files/upload/ request without any authentication token/cookies and abuse a very long multipart form boundary to make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19.
CVSS 7.5 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
langflow
- Versions
- < 1.0.19: Affected
No fix published
langflow PyPI
- Versions
- 0.0.31
- 0.0.32
- 0.0.33
- 0.0.40
- 0.0.44
- 0.0.45
- 0.0.46
- 0.0.52
- 0.0.53
- 0.0.54
- 0.0.55
- 0.0.56
- 0.0.57
- 0.0.58
- 0.0.61
- 0.0.62
- 0.0.63
- 0.0.64
- 0.0.65
- 0.0.66
- 0.0.67
- 0.0.68
- 0.0.69
- 0.0.70
- 0.0.71
- 0.0.72
- 0.0.73
- 0.0.74
- 0.0.75
- 0.0.76
- 0.0.78
- 0.0.79
- 0.0.80
- 0.0.81
- 0.0.83
- 0.0.84
- 0.0.85
- 0.0.86
- 0.0.87
- 0.0.88
- 0.0.89
- 0.1.0
- 0.1.2
- 0.1.3
- 0.1.4
- 0.1.5
- 0.1.6
- 0.1.7
- 0.2.0
- 0.2.1
- 0.2.10
- 0.2.11
- 0.2.12
- 0.2.13
- 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
- 0.3.1
- 0.3.2
- 0.3.3
- 0.3.4
- 0.4.0
- 0.4.1
- 0.4.10
- 0.4.11
- 0.4.12
- 0.4.14
- 0.4.15
- 0.4.16
- 0.4.17
- 0.4.18
- 0.4.19
- 0.4.2
- 0.4.20
- 0.4.21
- 0.4.3
- 0.4.4
- 0.4.5
- 0.4.6
- 0.4.7
- 0.4.8
- 0.4.9
- 0.5.0
- 0.5.0a0
- 0.5.0a1
- 0.5.0a2
- 0.5.0a3
- 0.5.0a4
- 0.5.0a5
- 0.5.0a6
- 0.5.0b0
- 0.5.0b2
- 0.5.0b3
- 0.5.0b4
- 0.5.0b5
- 0.5.0b6
- 0.5.1
- 0.5.10
- 0.5.11
- 0.5.12
- 0.5.2
- 0.5.3
- 0.5.4
- 0.5.5
- 0.5.6
- 0.5.7
- 0.5.8
- 0.5.9
- 0.6.0
- 0.6.0rc1
- 0.6.1
- 0.6.10
- 0.6.11
- 0.6.12
- 0.6.14
- 0.6.15
- 0.6.16
- 0.6.17
- 0.6.18
- 0.6.19
- 0.6.2
- 0.6.3
- 0.6.3a0
- 0.6.3a1
- 0.6.3a2
- 0.6.3a3
- 0.6.3a4
- 0.6.3a5
- 0.6.3a6
- 0.6.3a7
- 0.6.4
- 0.6.4a0
- 0.6.4a1
- 0.6.5
- 0.6.5a0
- 0.6.5a1
- 0.6.5a10
- 0.6.5a11
- 0.6.5a12
- 0.6.5a13
- 0.6.5a2
- 0.6.5a3
- 0.6.5a4
- 0.6.5a5
- 0.6.5a6
- 0.6.5a7
- 0.6.5a8
- 0.6.5a9
- 0.6.6
- 0.6.7
- 0.6.7a1
- 0.6.7a2
- 0.6.7a3
- 0.6.7a5
- 0.6.8
- 0.6.9
- 1.0.0
- 1.0.0a0
- 1.0.0a1
- 1.0.0a10
- 1.0.0a11
- 1.0.0a12
- 1.0.0a13
- 1.0.0a14
- 1.0.0a15
- 1.0.0a17
- 1.0.0a18
- 1.0.0a19
- 1.0.0a2
- 1.0.0a20
- 1.0.0a21
- 1.0.0a22
- 1.0.0a23
- 1.0.0a24
- 1.0.0a25
- 1.0.0a26
- 1.0.0a27
- 1.0.0a28
- 1.0.0a29
- 1.0.0a3
- 1.0.0a30
- 1.0.0a31
- 1.0.0a32
- 1.0.0a33
- 1.0.0a34
- 1.0.0a35
- 1.0.0a36
- 1.0.0a37
- 1.0.0a38
- 1.0.0a39
- 1.0.0a4
- 1.0.0a40
- 1.0.0a41
- 1.0.0a42
- 1.0.0a43
- 1.0.0a44
- 1.0.0a45
- 1.0.0a46
- 1.0.0a47
- 1.0.0a48
- 1.0.0a49
- 1.0.0a5
- 1.0.0a50
- 1.0.0a51
- 1.0.0a52
- 1.0.0a53
- 1.0.0a55
- 1.0.0a56
- 1.0.0a57
- 1.0.0a58
- 1.0.0a59
- 1.0.0a6
- 1.0.0a60
- 1.0.0a61
- 1.0.0a7
- 1.0.0a8
- 1.0.0a9
- 1.0.0rc0
- 1.0.0rc1
- 1.0.1
- 1.0.10
- 1.0.11
- 1.0.12
- 1.0.13
- 1.0.14
- 1.0.15
- 1.0.16
- 1.0.17
- 1.0.18
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.0.9
- Affected ranges
- ECOSYSTEM: < 1.0.19
Update to 1.0.19