CVE-2026-32859 MEDIUM

CVE-2026-32859: ByteDance DeerFlow Stored XSS via Inline Artifact Rendering

Vendor Bytedance Inc.
Product DeerFlow
Weakness CWE-79 · XSS
Published March 27, 2026
Last update May 12, 2026

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 27, 2026 CVE published
May 12, 2026 Record updated