Medium severity · published Sep 28, 2026
CVE-2026-101861
Langflow Code Execution via eval() in Component Input Schema
4.1
CVSS
0.2%
EPSS
No
On KEV
Description
Langflow 1.0.16 before 1.12.0 and 0.0.94 before 1.12.0 contain an unsafe eval() vulnerability in schema.py that allows authenticated attackers to achieve code execution by placing a Python object with a malicious __repr__ method into component input options lists. The eval() sink is triggered when a component is converted into a LangChain tool via ComponentToolkit.get_tools(), including during custom component saves through the API, by interpolating options into a Literal type string that is passed directly to eval() without safe evaluation controls.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
High
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LA
langflow · langflow-ai
1.0.16 before 1.12.0; 0.0.94 before 1.12.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101861
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101861
vendor-advisory
https://github.com/langflow-ai/langflow/security/advisories/GHSA-33p4-w7j3-33mw
release-notes
https://github.com/langflow-ai/langflow/releases#release-v1.12.0
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