CVE-2026-43979

Local Deep Research is an AI-powered research assistant for deep, iterative research. Prior to 1.6.0, PDFService._markdown_to_html() constructs an HTML document by interpolating user-controlled values — specifically title (sourced from research.title or research.query) and metadata key-value pairs — directly into an f-string without any HTML escaping. An authenticated attacker can craft a research query containing HTML special characters to inject arbitrary HTML tags into the document processed by WeasyPrint during PDF export. This injection can be chained to trigger a Server-Side Request Forgery (SSRF), bypassing the application's existing SSRF defenses in ssrf_validator.py. This vulnerability is fixed in 1.6.0.

CVSS v3.1

5.0 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

CVSS v3.1

5.0 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS

0.26% chance of exploitation in the next 30 days, 18th percentile

Published

2026-05-28

Proof-of-concept exploits (1)

• advisories/GHSA-fj2m-qvh9-jq4q

References

• CVE Record
• NVD entry

Related

• CVE-2026-43978
• CVE-2026-4398
• CVE-2026-43977
• CVE-2026-43995
• CVE-2026-43948
• CVE-2026-43998