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. NOTE: some third parties have indicated that this is intended behavior.

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.58% chance of exploitation in the next 30 days, 45th percentile

Published

2025-09-03

Updated

2025-09-08

Proof-of-concept exploits (1)

• https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseek

References

• CVE Record
• NVD entry

Related

• CVE-2025-2621
• CVE-2025-2622
• CVE-2025-26202
• CVE-2025-2623
• CVE-2025-2620
• CVE-2025-2624