CVE-2026-108852

Deep Chat through 2.5.1 XSS via Markdown Link Validation Bypass

Published Oct 11, 2026 CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Ovidijusparsiunas
Ovidijusparsiunas deep Chat
Vendors & Products Ovidijusparsiunas
Ovidijusparsiunas deep Chat
Type Values Removed Values Added
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.
Title Deep Chat through 2.5.1 XSS via Markdown Link Validation Bypass
First Time appeared Thinkinai
Thinkinai deepchat
Weaknesses CWE-79
CPEs cpe:2.3:a:thinkinai:deepchat:*:*:*:*:*:*:*:*
Vendors & Products Thinkinai
Thinkinai deepchat
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 13, 2026, 4:59 PM
Reserved
Oct 11, 2026, 12:57 PM
Status
Deferred
Published
Oct 11, 2026, 2:17 PM
Modified
Oct 16, 2026, 7:18 PM