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Description

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.

PUBLISHED Reserved 2026-03-16 | Published 2026-03-27 | Updated 2026-05-12 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

Product status

Default status
unaffected

Any version before 5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6
affected

Credits

Chia Min Jun Lennon finder

References

github.com/bytedance/deer-flow/pull/1389 issue-tracking

github.com/...ommit/5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6 patch

www.vulncheck.com/...tored-xss-via-inline-artifact-rendering third-party-advisory

cve.org (CVE-2026-32859)

nvd.nist.gov (CVE-2026-32859)

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