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TI-2026-26396 Aliases CVE-2026-34071

Stirling-PDF has Stored Cross Site Scripting (XSS) via EML-to-HTML Export

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. In version 2.7.3, the /api/v1/convert/eml/pdf endpoint with parameter downloadHtml=true returns unsanitized HTML from the email body with Content-Type: text/html. An attacker who sends a malicious email to a Stirling-PDF user can achieve JavaScript execution when that user exports the email using the "Download HTML intermediate file" feature. Version 2.8.0 fixes the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00271 19th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Stirling-ToolsStirling-PDF= 2.7.3—No fix listedCNA
  • Stirling-PDF VendorStirling-Tools Affected = 2.7.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:stirling:stirling_pdf:2.7.3:*:*:*:*:*:*:*2.7.3VulnerableStirling-Tools
  • cpe:2.3:a:stirling:stirling_pdf:2.7.3:*:*:*:*:*:*:* Versions 2.7.3 Vulnerable ·Stirling-Tools

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34071

References

Exploit 1

  • TI-2026-22007 Stirling-PDF Zip Slip: Arbitrary File Write via Path Traversal in Markdown-to-PDF ZIP Extraction CVSS 3.1HIGH 8.1
  • TI-2026-25835 Stirling-PDF vulnerable to DoS via add-watermark CVSS 3.1MEDIUM 6.5
  • TI-2026-30134 Stirling-PDF: Reflected XSS through crafted PDF metadata fields (Title and Author) CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences