What is CVE-2026-32859?

CVE-2026-32859 is a medium-severity vulnerability in Bytedance Inc. Deerflow, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-27.

How severe is CVE-2026-32859?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Bytedance Inc. Deerflow

CVE-2026-32859

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. Att…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (12.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Bytedance Inc. Deerflow — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-32859?: CVE-2026-32859 is a medium-severity vulnerability in Bytedance Inc. Deerflow, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-27.
How severe is CVE-2026-32859?: Medium severity. CVSS v3 base score is 5.4 out of 10.