CVE-2026-33438: medium-severity vulnerability in Stirling-Tools Stirling-PDF
Stirling-PDF vulnerable to DoS via add-watermark
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.4%
Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. Versions starting in 2.1.5 and prior to 2.5.2 have Denial of Service (DoS) vulnerability in the Stirling-PDF watermark functionality (`/api/v1/security/add-watermark` endpoint). The vulnerability allows authenticated users to cause resource exhaustion and server crashes by providing extreme values for the `fontSize` and `widthSpacer` parameters. Version 2.5.2 patches the issue.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Stirling-Tools · Stirling-PDFRelated CVEs — Stirling-Tools Stirling-PDF
In the same product, most dangerous first.
CVE-2026-85714CRITICALStirling-PDF: Remote Code Execution via H2EPSS 3.4%CVE-2025-55161HIGHStirling-PDF SSRF vulnerability on /api/v1/convert/markdown/pdfEPSS 2.2%CVE-2025-55150HIGHStirling-PDF SSRF vulnerability on /api/v1/convert/html/pdfEPSS 1.8%CVE-2026-113605HIGHStirling-PDF 2.13.2 through 3.2.0 H2 SQL Denylist Bypass via import-databaseEPSS 0.7%CVE-2024-52286LOWSelf Cross Site Scripting (XSS) In Merge Functionality in Stirling-PDFEPSS 0.5%CVE-2025-46568HIGHStirling-PDF Server-Side Request Forgery (SSRF)-Induced Arbitrary File Read VulnerabilityEPSS 0.5%