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CVE Vulnerability Details :
CVE-2026-55446
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-23 Jun, 2026 | 16:26
Updated At-23 Jun, 2026 | 17:56
Rejected At-
▼CVE Numbering Authority (CNA)
Langflow: Unauthenticated DoS through multipart form boundary file upload

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.

Affected Products
Vendor
langflow-ai
Product
langflow
Versions
Affected
  • < 1.0.19
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400: Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-400
Description: CWE-400: Uncontrolled Resource Consumption
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9
x_refsource_CONFIRM
https://github.com/langflow-ai/langflow/pull/3923
x_refsource_MISC
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/langflow-ai/langflow/pull/3923
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9
exploit
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9
Resource:
exploit
Details not found