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CVE-2026-93571

Path Traversal in Szafir

Szafir is vulnerable to Path Traversal in the uploaded filename. A man-in-the-middle attacker who can reroute update request to their server can prepare arbitrary XML file that will be saved in location chosen by attacker.  This issue was fixed in version 2.0 build 708.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafir
CVE-2026-93570

XML External Entity injection in Szafir and Szafir Weryfikująca

Szafir and Szafir Weryfikująca are vulnerable to XML External Entity (XXE) injection. When a user signs or verify a crafted XML file containing a `DOCTYPE` with an external DTD reference, the parser processes external entities, allowing an attacker to read arbitrary files from the victim's filesystem. This issue was fixed in Szafir version 2.0 build 708. Szafir Weryfikująca is no longer supported (End of Life) and has not been fixed.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafir Szafir Weryfikuj Ca
CVE-2026-106036

Improper certificate validation in Szafir

Szafir accepts any client or server certificate without performing certificate and hostname validation, allowing HTTPS connections without authenticating the remote server. An attacker can provide an arbitrary SSL/TLS certificate and cause the application to download an update file from their server. This issue was fixed in version 2.0 build 708.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafir
CVE-2026-13165

Remote Code Execution in SzafirHost

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.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafirhost
CVE-2026-9058

Improper Certificate Verification in Szafir SDK

For untrusted certificates that contain the "Authority Information Access - caIssuers URI" extension, Szafir SDK will automatically download the parent CA certificate from the specified URL and will import it to its trust store as a "nonqualified" certificate. In such a case, Szafir SDK returns a success status code of 0 ("Positively verified") upon successful cryptographic verification and a certificate status of "nonqualified". For other types of untrusted certificates, Szafir SDK returns a success status code of 0 ("Positively verified") upon successful cryptographic verification and a certificate status of "nondetermined". This may lead integrating applications to incorrectly treat the digital signature as valid despite an untrusted certificate chain. This flaw enables authentication bypass and user impersonation: (1) in use-cases other than qualified certificate authentication, or (2) if the qualified certificate authentication use-case is not correctly implemented by the integrating application. This issue was fixed in version 1.8.463.2.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafir Sdk
CVE-2026-44088

Remote Code Execution in SzafirHost

SzafirHost verifies the signature of the downloaded JAR file using class JarInputStream (reading from the beginning of the file), but loads classes using class JarFile/URLClassLoader (reading the Central Directory from the end). It can lead to remote code execution by allowing an attacker to combine a genuine, signed JAR file with a malicious ZIP file, causing the verification to pass but the malicious class to be loaded. This issue was fixed in version 1.2.1.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafirhost
CVE-2026-26928

Lack of Dynamic Library Validation in SzafirHost

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafirhost
CVE-2026-26927

URL (HTTP Origin) call location spoofing in Szafir SDK Web

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.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Krajowa Izba Rozliczeniowa
Products
Szafir Sdk Web