CVE-2026-26928: Lack of Dynamic Library Validation in SzafirHost

Severity: high (CVSS 8.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-02 · updated 2026-10-26
Weakness: CWE-354

Description

SzafirHost downloads necessary files in the context of the initiating web page. When called, SzafirHost updates its dynamic library. JAR files are correctly verified based on a list of trusted file hashes, and if a file was not on that list, it was checked to see if it had been digitally signed by the vendor. The application doesn't verify hash or vendor's digital signature of uploaded DLL, SO, JNILIB or DYLIB file. The attacker can provide malicious file which will be saved in users /temp folder and executed by the application. This issue was fixed in version 1.1.0.

Affected products

Krajowa Izba Rozliczeniowa SzafirHost: before 1.1.0 — fixed in 1.1.0

How to fix

Upgrade to a fixed version: Krajowa Izba Rozliczeniowa SzafirHost 1.1.0. Check the vendor advisory for mitigations.

References

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