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Szafir SDK Web CVE-2026-26927

| EUVD-2026-18228 MEDIUM
Use of Less Trusted Source (CWE-348)
2026-04-02 cvd@cert.pl
5.1
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
A
Scope
X

Lifecycle Timeline

3
EUVD ID Assigned
Apr 02, 2026 - 14:22 euvd
EUVD-2026-18228
Analysis Generated
Apr 02, 2026 - 14:22 vuln.today
CVE Published
Apr 02, 2026 - 14:16 nvd
MEDIUM 5.1

DescriptionNVD

Szafir SDK Web is a browser plug-in that can run SzafirHost application which download the necessary files when launched. In Szafir SDK Web it is possible to change the URL (HTTP Origin) of the application call location. An unauthenticated attacker can craft a website that is able to launch SzafirHost application with arbitrary arguments via Szafir SDK Web browser addon. No validation will be performed to check whether the address specified in document_base_url parameter is in any way related to the actual address of the calling web application. The URL address specified in document_base_url parameter is then shown in the application confirmation prompt. When a victim confirms the execution of the application, it will be called in the context of attacker's website URL and might download additional files and libraries from that website. When victim accepts the application execution for the URL showed in the confirmation prompt with the "remember" option before, the prompt won't be shown and the application will be called in the context of URL provided by the attacker without any interaction.

This issue was fixed in version 0.0.17.4.

AnalysisAI

Szafir SDK Web browser addon allows unauthenticated attackers to launch the SzafirHost application with arbitrary arguments by crafting malicious websites that spoof the HTTP origin via the document_base_url parameter. When a victim visits an attacker's site and confirms application execution (or has previously selected 'remember' for a spoofed origin), the application runs in the attacker's context, potentially downloading malicious files and libraries without further user interaction. …

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CVE-2026-26927 vulnerability details – vuln.today

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