8.8

CVE-2026-81941: ibm langflow oss Improper Access Control

CVSS: 8.8v3.1HighAnalyzed
Published 10-09-2026Last modified 12-09-2026
Open JSON

Vulnerability summary

CVE-2026-81941 is a high (CVSS 8.8) Improper Access Control vulnerability in ibm langflow oss. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.63%
0%100%
Low · -0.13 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-09-2026
    PublishedVulnerability first disclosed.
  2. 12-09-2026
    Last modifiedVulnerability information updated.

Description

IBM Langflow OSS 1.0.0 through 1.11.5 allows an authenticated non-administrative user could execute arbitrary operating system commands on the server at the privilege level of the application process by constructing a flow with an MCP Tools component configured to use a local stdio subprocess transport. This bypasses both the LANGFLOW_CUSTOM_COMPONENT_ADMIN_ONLY and LANGFLOW_BLOCK_CODE_INTERPRETER_COMPONENTS server-side controls intended to prevent exactly this class of access. Successful exploitation could lead to arbitrary command execution, sensitive data exposure (including credentials from the process environment), file system modification, and lateral movement to services reachable from the server.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

-0.13 pp

From 0.76% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ibm1 product
Langflow1 product

2 vendors · 2 products

References

1 links