CVE-2025-26210HIGH 8.8EPSS p41.1%

CVE-2025-26210CVE-2025-26210

Description

DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain. NOTE: some third parties have indicated that this is intended behavior.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS0.54% probability of exploitation · percentile 41.1% · 2026-06-18T12:00:27Z
Published2025-09-03
Last modified2025-09-26

Underlying weaknesses· 1

CWE-79

References

  1. https://deepseek.com
  2. https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseek
  3. https://youtu.be/IgQwy52FVT4

1

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting')cwe-790%live

Related by meaning· 6

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.