---
id: CVE-2026-32859
title: ByteDance DeerFlow Stored XSS via Inline Artifact Rendering
summary: "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. A…"
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: Bytedance Inc.
product: DeerFlow
affected:
  - DeerFlow < 5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-27T19:36:38.427787Z'
published: '2026-03-27'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:02:02.649Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-32859'
references:
  - url: 'https://github.com/bytedance/deer-flow/pull/1389'
  - url: >-
      https://github.com/bytedance/deer-flow/commit/5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6
  - url: >-
      https://www.vulncheck.com/advisories/bytedance-deerflow-stored-xss-via-inline-artifact-rendering
tags:
  - cve.org
epss: 0.002
epssPercentile: 0.09863
ingestedAt: '2026-11-08T14:51:22.454Z'
---

## Overview

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.

## Affected

- `DeerFlow < 5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.