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 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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-3932-2rfq-87xm	Exploit Vendor Advisory
https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-3932-2rfq-87xm	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:stirling:stirling_pdf:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-26 17:16

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33438

Mitre link : CVE-2026-33438

CVE.ORG link : CVE-2026-33438

JSON object : View

Products Affected

stirling

stirling_pdf

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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