CVE-2026-32859
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk10th percentile - higher than 10% of all known CVEs
Summary
A stored cross-site scripting vulnerability in the artifacts API of ByteDance DeerFlow prior to commit 5dbb362 allows attackers to inject malicious HTML or JavaScript by uploading it as artifacts. The code executes in the browser context when users view the artifacts.
Risk Assessment
The risk includes session hijacking, credential theft, and arbitrary script execution in the victim's browser, potentially leading to unauthorized system access and data leakage.
Recommendation
Immediately update DeerFlow to a version containing commit 5dbb362 or later, and implement validation and sanitization of uploaded artifacts.
Other vulnerabilities in ByteDance DeerFlow
See all- CVE-2026-40518High
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.
- CVE-2026-34430High
A sandbox escape vulnerability in ByteDance DeerFlow prior to commit 92c7a20 allows attackers to bypass regex-based validation using shell features like directory changes and relative paths. This enables arbitrary command execution on the host system through subprocess invocation with shell interpretation enabled.
Original NVD description (English source)
ByteDance DeerFlow versions prior to commit 5dbb362 contain a stored cross-site scripting vulnerability in the artifacts API that allows attackers to execute arbitrary scripts by uploading malicious HTML or script content as artifacts. Attackers can store malicious content that executes in the browser context when users view artifacts, leading to session compromise, credential theft, and arbitrary script execution.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS