CVE-2026-51886 langflow-ai langflow - Code Injection

langflow-ai langflow <= 1.9.3 contains a code injection caused by lack of sandboxing in /api/v1/validate/code endpoint, letting authenticated attackers execute arbitrary Python code remotely, exploit requires authentication.

CVSS base score 9.8 /10
Critical
CISA KEV
Exploited in the wild
Public exploit
None known
Authentication
Not required
EPSS
0.40% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Code Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Update to the latest version beyond 1.9.3 that patches this vulnerability.

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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