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Medium severity6.5NVD Advisory· Published Mar 26, 2026· Updated Mar 31, 2026

CVE-2026-33438

CVE-2026-33438

Description

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.

AI Insight

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Affected products

2
  • Stirlingpdf/Stirling PDF2 versions
    cpe:2.3:a:stirling:stirling_pdf:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:stirling:stirling_pdf:*:*:*:*:*:*:*:*range: >=2.1.5,<2.5.2
    • (no CPE)range: >=2.1.5, <2.5.2

Patches

Vulnerability mechanics

References

1

News mentions

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