Remote Code Execution in IBM Langflow OSS by Incomplete Environment Variable Blocklist
CVE-2026-79742

8.8HIGH

Key Information:

Vendor

IBM
Status
Langflow Oss
Vendor
CVE Published:
10 September 2026

What is CVE-2026-79742?

IBM Langflow OSS versions 1.0.0 to 1.11.5 are susceptible to a remote code execution vulnerability due to an inadequate blocklist for environment variables. This flaw allows an authenticated remote attacker to execute arbitrary code, posing a significant security risk. Users are advised to implement patches provided by IBM to mitigate this issue.

Affected Version(s)

Langflow OSS 1.0.0 <= 1.11.5

References

https://www.ibm.com/support/pages/node/7286666
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.