{"id":"CVE-2026-51886","published":"2026-10-01T22:17:03.387","lastModified":"2026-10-06T01:16:36.093","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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-94"],"vendors":[],"products":[],"references":[{"url":"https://gist.github.com/Ro1ME/c11b1e63e4e8fca6b25275144f25ec2a","tags":[]},{"url":"https://github.com/langflow-ai/langflow/issues/13336","tags":[]},{"url":"https://github.com/langflow-ai/langflow/issues/13336","tags":[]}],"exploitRefs":[{"url":"https://gist.github.com/Ro1ME/c11b1e63e4e8fca6b25275144f25ec2a","tags":[]},{"url":"https://github.com/langflow-ai/langflow/issues/13336","tags":[]},{"url":"https://github.com/langflow-ai/langflow/issues/13336","tags":[]}],"hasPoc":true,"ai":{"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.","remediation":"Upgrade to langflow v1.9.4 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","auth-bypass","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-06T08:44:26.568Z"}}