---
id: CVE-2026-93570
title: XML External Entity injection in Szafir and Szafir Weryfikująca
summary: >-
  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 …
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-611
vendor: Krajowa Izba Rozliczeniowa
product: Szafir
affected:
  - Szafir <= 2.0.0
  - szafir_weryfikuj_ca <= 1.0
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T15:07:48.053Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-93570'
references:
  - url: 'https://cert.pl/posts/2026/10/CVE-2026-93570'
  - url: 'https://www.elektronicznypodpis.pl/'
tags:
  - cve.org
epss: 0.00278
epssPercentile: 0.20316
ingestedAt: '2026-11-01T20:00:16.949Z'
---

## Overview

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.

## Affected

- `Szafir <= 2.0.0`
- `szafir_weryfikuj_ca <= 1.0`

## Remediation

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