XSS in Ovidijusparsiunas Deep Chat
CVE-2026-108852
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/ovidijusparsiunas-deep-chat-markdown-scheme-v… (third-party-advisory)
- github.com/OvidijusParsiunas/deep-chat/blob/2.5.1/component/src/views/chat/mess… (technical-description)
- github.com/OvidijusParsiunas/deep-chat (product)
- www.vulncheck.com/advisories/deep-chat-through-2.5.1-xss-via-markdown-link-vali… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108852?
- CVE-2026-108852 is a medium-severity vulnerability in Ovidijusparsiunas Deep Chat, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-10-11.
- How severe is CVE-2026-108852?
- Medium severity. CVSS v3 base score is 4.7 out of 10.