CVE-2026-51888 langflow-ai langflow - Path Traversal

langflow-ai langflow <= 1.8.4 contains a path traversal caused by lack of boundary enforcement in knowledge_bases-create_knowledge_base HTTP POST endpoint, letting attackers write files outside intended workspace, exploit requires HTTP access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.56% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Write, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to the latest version beyond 1.8.4.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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