Krajowa Izba Rozliczeniowa SzafirHost up to 1.0.x JAR File Parser /temp integrity check

Summaryinfo

A vulnerability has been found in Krajowa Izba Rozliczeniowa SzafirHost up to 1.0.x and classified as critical. This issue affects some unknown processing of the file /temp of the component JAR File Parser. The manipulation leads to integrity check. This vulnerability is referenced as CVE-2026-26928. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Krajowa Izba Rozliczeniowa SzafirHost up to 1.0.x and classified as critical. This issue affects an unknown part of the file /temp of the component JAR File Parser. The manipulation with an unknown input leads to a integrity check vulnerability. Using CWE to declare the problem leads to CWE-354. The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published by Michał Leszczyński. It is possible to read the advisory at cert.pl. The identification of this vulnerability is CVE-2026-26928 since 02/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.1.0 eliminates this vulnerability.

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Productinfo

Vendor

• Krajowa Izba Rozliczeniowa

Name

• SzafirHost

Version

• 1.0

CPE 2.3info

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CPE 2.2info

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