CVE-2026-13435

Python Interpreter Sandbox Bypass Leading to Sensitive Data Exposure

Published Jul 30, 2026 CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed
Description
IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.

Remediation

Vendor Solution

IBM strongly recommends addressing the vulnerability now by upgrading Langflow OSS to version 1.10.2 https://pypi.org/project/langflow/

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.
Title Python Interpreter Sandbox Bypass Leading to Sensitive Data Exposure
First Time appeared Ibm
Ibm langflow Oss
Weaknesses CWE-94
CPEs cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:langflow_oss:1.10.1:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm langflow Oss
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Jul 31, 2026, 3:56 AM
Reserved
Jun 26, 2026, 3:01 PM
Status
Analyzed
Published
Jul 30, 2026, 7:17 PM
Modified
Oct 23, 2026, 10:10 PM