CVE-2026-33438 Stirling-PDF vulnerable to DoS via add-watermark

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 vulnerabilit...

CVE-2026-33438

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...

Stirling-PDF security vulnerability

Stirling-PDF is a powerful, locally hosted web-based PDF manipulation tool developed by Stirling Tools and open source using Docker. Versions of Stirling-PDF prior to 2.5.2 contained a security vulnerability. This vulnerability stemmed from insufficient validation of the fontSize and widthSpacer...

CVE-2026-33438: Allocation of Resources Without Limits or Throttling

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 vulnerabilit...