PT-2026-28483 · Unknown · Stirling-Pdf

Crocogab · Published 2026-03-26 · Updated 2026-03-26 · CVE-2026-33438

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Stirling-PDF versions 2.1.5 through 2.5.1

Description Stirling-PDF is a locally hosted web application for PDF file operations. An authenticated user can trigger a Denial of Service (DoS) condition by submitting extreme values for the fontSize and widthSpacer parameters to the /api/v1/security/add-watermark endpoint. This can lead to resource exhaustion and server crashes.

Recommendations Versions prior to 2.5.2 should be updated to version 2.5.2 or later.

Exploit

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-33438

GHSA-3932-2RFQ-87XM

Affected Products

Stirling-Pdf

References · 6

• 🔥 https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-3932-2rfq-87xm · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33438.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-33438 · Security Note
• https://osv.dev/vulnerability/CVE-2026-33438 · Vendor Advisory
• https://twitter.com/infoflowcloud/status/2037281429097222356 · Twitter Post
• https://twitter.com/CVEnew/status/2037280616379826326 · Twitter Post