🛡️ CVE-2026-33438
🟡 CVSS 6.5 — Medium ⚠️ Exploit Public CWE-770 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-770
Public Exploit ⚠️ Yes
Source NVD
Published 2026-03-26
Updated 2026-06-02
Modified 2026-03-31
Fix URL N/A

Affected Packages

Software From version Fixed in
stirling-pdf 2.1.5 2.5.2

Similar Threats

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