CVE-2026-34071 — MEDIUM (5.4)

Vulnerability Description

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.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Stirling	Stirling Pdf	2.7.3

Related Weaknesses (CWE)

CWE-79

References

https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-xmhg-fv8ExploitVendor Advisory

FAQ

What is CVE-2026-34071?

CVE-2026-34071 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 ret...

How severe is CVE-2026-34071?

CVE-2026-34071 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-34071?

Check the references section above for vendor advisories and patch information. Affected products include: Stirling Stirling Pdf.