Medium severity · published Apr 30, 2026
CVE-2026-4502
Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot" sequences (/../) to write arbitrary files on the system.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LD
Langflow Desktop · IBM
1.2.0 through 1.8.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4502
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4502
Vendor Advisory
https://www.ibm.com/support/pages/node/7271097
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