Critical severity · published Jun 22, 2026
CVE-2026-10561
Unauthenticated Remote Code Execution in Langflow OSS PythonREPLComponent via Builtins Injection
10.0
CVSS
0.8%
EPSS
No
On KEV
Description
IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LO
Langflow OSS · IBM
1.0.0 through 1.9.3 · source: vendor
LA
Langflow · Langflow
1.0.0 through 1.9.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-10561
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-10561
Vendor Advisory
https://www.ibm.com/support/pages/node/7277242
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