7.5

CVE-2026-55446: langflow-ai langflow Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighAnalyzed
AliasesGHSA-qwqc-p3q8-wcg9PYSEC-2026-223
Published 23-06-2026Last modified 23-06-2026
Open JSON

Vulnerability summary

CVE-2026-55446 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in langflow-ai langflow. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.58%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 23-06-2026
    PublishedVulnerability first disclosed.
  2. 23-06-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.58%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

0.00 pp

From 0.58% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.58%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Langflow

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Langflow1 product
Langflow-ai1 product
PyPI1 product
  • langflow< 1.0.19

3 vendors · 3 products

References

4 links