CVE-2026-51886

9.8 CRITICALpublic exploit available

Published 2026-10-01 · Updated 2026-10-06

AI risk analysis

Summary: The flaw allows an authenticated attacker to execute arbitrary Python code on the server, leading to remote code execution.
Exploitability: Exploitation is relatively easy given an authenticated session, but requires access to the /api/v1/validate/code endpoint.
Blast radius: If exploited, the impact is high as it can lead to complete server compromise and potential data loss or theft.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to langflow v1.9.4 or later.

rceauth-bypassweb

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

langflow-ai langflow v1.9.3 is affected by: Code Injection. The impact is: execute arbitrary code (remote). The component is: src/backend/base/langflow/api/v1/validate.py:validate-post_validate_code-a-real-authenticated-http-post-to-api-v1. The attack vector is: Attack surface: HTTP or browser-backed service path. A public-facing route accepts raw Python source and forwards it into a server-side compile/exec validation path without any visible entitlement guard. ¶¶ A weakness has been identified in langflow-ai langflow up to 1.9.3. langflow contains a code injection vulnerability in validate-post_validate_code-a-real-authenticated-http-post-to-api-v1 (src/backend/base/langflow/api/v1/validate.py:13). An authenticated attacker can execute arbitrary Python code on the server by submitting malicious code to the /api/v1/validate/code endpoint, which directly executes user-supplied code without sandboxing or security controls.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-94

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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