Krajowa Izba Rozliczeniowa SzafirHost up to 1.2.1 JarFile Parser unrestricted upload

Summaryinfo

A vulnerability classified as critical has been found in Krajowa Izba Rozliczeniowa SzafirHost up to 1.2.1. This impacts an unknown function of the component JarFile Parser. Performing a manipulation results in unrestricted upload. This vulnerability is known as CVE-2026-13165. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Krajowa Izba Rozliczeniowa SzafirHost up to 1.2.1. This affects some unknown processing of the component JarFile Parser. The manipulation with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

SzafirHost verifies the downloaded native library archive with one JarFile parser (reading the Central Directory) but extracts native libraries with JarInputStream parser (reading sequentially from local file headers). An attacker who controls the served archive can insert a malicious DLL/SO/DYLIB as a local-file-header entry between the last legitimate entry and the Central Directory, without adding it to the Central Directory. The signature verifier never sees the injected entry and accepts the archive as validly signed; the extractor reads it sequentially and writes the attacker library to the native temp directory with no hash check), while the archive-size check still passes. This can lead to remote code execution. This issue was fixed in version 1.2.2.

The weakness was published by Mariusz Maik. The advisory is shared at cert.pl. This vulnerability is uniquely identified as CVE-2026-13165 since 06/24/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

Upgrading to version 1.2.2 eliminates this vulnerability.

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Productinfo

Vendor

• Krajowa Izba Rozliczeniowa

Name

• SzafirHost

Version

• 1.2.0
• 1.2.1

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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