Vulnerability DatabaseCVE-2026-33438
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CVE-2026-33438
March 26, 2026
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 Packages
https://github.com/Stirling-Tools/Stirling-PDF.git (GITHUB):
Affected version(s) >=v2.1.5 <v2.5.2
Fix Suggestion:
Update to version v2.5.2
https://github.com/Stirling-Tools/Stirling-PDF.git (GITHUB):
Affected version(s) >=v2.1.5 <v2.5.2
Fix Suggestion:
Update to version v2.5.2
https://github.com/Stirling-Tools/Stirling-PDF.git (GITHUB):
Affected version(s) >=v2.1.5 <v2.5.2
Fix Suggestion:
Update to version v2.5.2
https://github.com/Stirling-Tools/Stirling-PDF.git (GITHUB):
Affected version(s) >=v2.1.5 <v2.5.2
Fix Suggestion:
Update to version v2.5.2
https://github.com/Stirling-Tools/Stirling-PDF.git (GITHUB):
Affected version(s) >=v2.1.5 <v2.5.2
Fix Suggestion:
Update to version v2.5.2
https://github.com/Stirling-Tools/Stirling-PDF.git (GITHUB):
Affected version(s) >=v2.1.5 <v2.5.2
Fix Suggestion:
Update to version v2.5.2
Related Resources (1)
https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-3932-2rfq-87xm
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Allocation of Resources Without Limits or Throttling
CWE-770
EPSS
Base Score:
0.04