CVE-2026-32859

ByteDance DeerFlow Stored XSS via Inline Artifact Rendering

CVSS 5.1 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.1EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

27 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Bytedance Inc. · DeerFlow

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References

https://github.com/bytedance/deer-flow/commit/5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6 https://github.com/bytedance/deer-flow/pull/1389 https://www.vulncheck.com/advisories/bytedance-deerflow-stored-xss-via-inline-artifact-rendering