CVE-2026-108852 Details
Description
Deep Chat through 2.5.1 contains a cross-site scripting vulnerability that allows attackers to inject javascript: links because RemarkableConfig.createNew disables Remarkable link validation. Attackers can place crafted Markdown links in AI responses, addMessage content, or loaded history to execute script in the embedding page when victims click them.
A cross-site scripting vulnerability has been identified in Deep Chat versions 1.4.7 prior to 2.5.1. The issue arises because the Markdown renderer's link validation has been disabled, allowing attackers to inject links with dangerous JavaScript schemes. This vulnerability can be exploited by crafting Markdown links that, when clicked by a victim, execute scripts in the context of the embedding page.
The vulnerability can be fixed by restoring the link validation to reject dangerous schemes, sanitizing the rendered HTML before inserting it into the chat DOM, and adding a Content Security Policy that restricts script execution.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 11, 2026CISA-ADP
Assessed Oct 13, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Deep Chat | >= 1.4.7, <= 2.5.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 13, 2026 | CVE Modified | CISA-ADP |
| Oct 11, 2026 | New CVE Received | [email protected] |