CVE-2025-26210

DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain

High · published September 3, 2025

CVSS v3.1
8.8
EPSS
1%
Percentile
46.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00579 · 46.9th percentile
Published
2025-09-03T00:00Z
EPSS history
Timeline
  • 03 SEP 00:00Z
    DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain
    cvelistv5