CVE-2026-55446

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-55446
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55446.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55446
Aliases
Published
2026-06-23T16:26:17.990Z
Modified
2026-07-08T08:13:45.452884296Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Langflow: Unauthenticated DoS through multipart form boundary file upload
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55446.json"
}
References

Affected packages

Git / github.com/langflow-ai/langflow

Affected ranges

Type
GIT
Repo
https://github.com/langflow-ai/langflow
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
06013ae86a882e5ab3fe547c272adf5a3620c8a5
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.0.19"
        }
    ],
    "cpe": "cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*"
}

Affected versions

v0.*
v0.0.31
v0.0.69
v0.0.70
v0.0.71
v0.0.72
v0.0.73
v0.0.74
v0.0.75
v0.0.76
v0.0.77
v0.0.78
v0.0.79
v0.0.80
v0.0.81
v0.0.82
v0.0.83
v0.0.84
v0.0.85
v0.0.86
v0.0.87
v0.0.88
v0.0.89
v0.1.0
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.2.0
v0.2.1
v0.2.10
v0.2.11
v0.2.12
v0.2.13
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.2.7
v0.2.8
v0.2.9
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.4.0
v0.4.1
v0.4.10
v0.4.11
v0.4.12
v0.4.14
v0.4.15
v0.4.16
v0.4.17
v0.4.18
v0.4.19
v0.4.2
v0.4.20
v0.4.21
v0.4.3
v0.4.4
v0.4.5
v0.4.6
v0.4.7
v0.4.8
v0.4.9
v0.5.0
v0.5.0a0
v0.5.0a1
v0.5.0a2
v0.5.0a3
v0.5.0a4
v0.5.0a5
v0.5.0a6
v0.5.0b0
v0.5.0b2
v0.5.0b3
v0.5.0b4
v0.5.0b5
v0.5.0b6
v0.5.1
v0.5.10
v0.5.11
v0.5.12
v0.5.2
v0.5.3
v0.5.4
v0.5.5
v0.5.6
v0.5.7
v0.5.8
v0.5.9
v0.6.0
v0.6.0a0
v0.6.0rc1
v0.6.1
v0.6.10
v0.6.11
v0.6.12
v0.6.13
v0.6.14
v0.6.15
v0.6.16
v0.6.17
v0.6.18
v0.6.19
v0.6.2
v0.6.3
v0.6.3a0
v0.6.3a1
v0.6.3a2
v0.6.3a3
v0.6.3a4
v0.6.3a5
v0.6.3a6
v0.6.4
v0.6.5
v0.6.6
v0.6.7
v0.6.8
v0.6.9
v1.*
v1.0.10
v1.0.11
v1.0.12
v1.0.13
v1.0.14
v1.0.15
v1.0.16
v1.0.17
v1.0.18
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.0.8
v1.0.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55446.json"