---
id: CVE-2026-106036
title: Improper certificate validation in Szafir
summary: >-
  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
  cau…
severity: medium
cvss: 6.9
cvssVector: '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'
cvssSource: cna
cwe:
  - CWE-295
vendor: Krajowa Izba Rozliczeniowa
product: Szafir
affected:
  - Szafir <= 2.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-05T21:18:42.903462Z'
published: '2026-10-29'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:18:53.880Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-106036'
references:
  - url: 'https://cert.pl/posts/2026/10/CVE-2026-93570'
  - url: 'https://www.elektronicznypodpis.pl/'
tags:
  - cve.org
epss: 0.00167
epssPercentile: 0.05978
ingestedAt: '2026-11-01T20:00:16.956Z'
---

## Overview

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

- `Szafir <= 2.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.