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HIGH · 8.8

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 b...

Vulnerability 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.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
DeepseekDeepseek-R11.0
DeepseekDeepseek-V2-
DeepseekDeepseek-V31.0

Related Weaknesses (CWE)

CWE-79

References

FAQ

What is CVE-2025-26210?

CVE-2025-26210 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 b...

How severe is CVE-2025-26210?

CVE-2025-26210 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-26210?

Check the references section above for vendor advisories and patch information. Affected products include: Deepseek Deepseek-R1, Deepseek Deepseek-V2, Deepseek Deepseek-V3.