Description

ByteDance DeerFlow before commit 2176b2b contains a path traversal and arbitrary file write vulnerability in bootstrap-mode custom-agent creation where the agent name validation is bypassed. Attackers can supply traversal-style values or absolute paths as the agent name to influence directory creation and write files outside the intended custom-agent directory, potentially achieving arbitrary file write on the system subject to filesystem permissions.

INFO

Published Date :

2026-04-17T16:43:42.387Z

Last Modified :

2026-04-17T18:35:51.128Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40518 vulnerability.

Vendors Products
Bytedance
  • Deer-flow
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40518.

URL Resource
https://github.com/bytedance/deer-flow/commit/2176b2bbfccfce25ceee08318813f96d843a13fd cve-icon cve-icon
https://github.com/bytedance/deer-flow/pull/2274 cve-icon cve-icon
https://www.vulncheck.com/advisories/bytedance-deerflow-path-traversal-and-arbitrary-file-write-via-bootstrap-mode cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact