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CVE-2026-33438

Stirling-PDF vulnerable to DoS via add-watermark PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Stirling-Tools / Stirling-PDFaffected >= 2.1.5, < 2.5.2

CWE

CWE-770

References

ADP enrichment

CISA-ADP

No English description supplied.