Vulnerability · Published Oct 29, 2026 · Assigned by CERT-PL

CVE-2026-106036Improper certificate validation in Szafir

Medium 6.9

In plain English

A medium-severity improper certificate validation in Szafir from Krajowa Izba Rozliczeniowa. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.2%top 94.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Krajowa Izba Rozliczeniowa	Szafir	0 – through 2.0

Weakness: CWE-295 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://cert.pl/posts/2026/10/CVE-2026-93570 third-party-advisory
https://www.elektronicznypodpis.pl/ product