CVE-2026-119343
Stirling-PDF: AI create-pdf-from-html-agent skips HTML sanitization enabling WeasyPrint SSRF and local file read
- State
- Published
- Severity
- 6.8 Medium
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 29, 2026
Description
Stirling-PDF is a locally hosted web application that facilitates various operations on PDF files. Prior to 3.0.0, POST /api/v1/ai/tools/create-pdf-from-html-agent accepts attacker-controlled htmlContent and passes it to WeasyPrint without CustomHtmlSanitizer, unlike the sanitized /api/v1/convert/html/pdf control path. HTTP and HTTPS resource references can make server-side requests to internal or cloud-metadata destinations, while file references can embed local content readable by the Stirling-PDF process into the generated PDF. The endpoint is reachable without credentials when security.enableLogin is false, and the flaw is distinct from earlier Stirling-PDF WeasyPrint vulnerabilities in older conversion paths. This issue is fixed in version 3.0.0.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Stirling-PDFStirling-Tools |
|
References
- https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-3x7x-943g-269w
- https://github.com/Stirling-Tools/Stirling-PDF/pull/7018
- https://github.com/Stirling-Tools/Stirling-PDF/commit/0570c4c4d9e7bf4786a02ab770ef75f116ac3719
- https://github.com/Stirling-Tools/Stirling-PDF/releases/tag/v3.0.0
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