High severity · published Sep 4, 2026
CVE-2026-19298
Langflow is vulnerable to remote code execution due to authorization policy bypass in the authenticated flow-build endpoint
8.8
CVSS
0.9%
EPSS
No
On KEV
Description
IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to execute arbitrary code due to an authorization bypass in the flow build process.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% 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 1.11.2 · source: vendor
LA
Langflow · Langflow
1.0.0 before 1.11.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19298
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19298
Patch
https://www.ibm.com/support/pages/node/7285640
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