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

CVE-2026-93570XML External Entity injection in Szafir and Szafir Weryfikująca

High 8.2

In plain English

A high-severity XML external entity 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 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 4.0)8.2High

Exploit odds (30 days)0.3%top 79.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
Krajowa Izba Rozliczeniowa	Szafir	0 – through 2.0.0
Krajowa Izba Rozliczeniowa	Szafir Weryfikująca	0 – through 1.0

Weakness: CWE-611 · Vector: 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

References

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