SQL Denylist Bypass Vulnerability in Stirling-PDF by Abraxas
CVE-2026-113605

8.6HIGH

Key Information:

Vendor

Stirling-tools

Status
Stirling-PDF
Vendor
CVE Published:
20 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-113605?

A vulnerability in Stirling-PDF versions 2.13.2 through 3.2.0 allows authenticated administrators to bypass H2 database import restrictions. This occurs due to an incomplete denylist in the DatabaseService.validateSqlContent() method, enabling the execution of unauthorized SQL commands when a crafted SQL backup is uploaded to the import-database endpoint. The flaw permits the use of CREATE OR REPLACE ALIAS, which allows for the definition of H2 Java function aliases and can lead to the execution of arbitrary Java methods, thus posing significant risk to data integrity and security.

Affected Version(s)

Stirling-PDF 2.13.2 <= 3.2.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-113605 - Proof of Concept

References

https://github.com/abraxas/stirling-h2-import-leftover
exploittechnical-description
https://abraxaslabs.tech/research/stirling-h2-import-left...
technical-description
https://abraxaslabs.tech/research/stirling-pdf-3.2.0-left...
technical-description

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Abraxas Labs
.