# CVE-2026-44088: Krajowa Izba Rozliczeniowa SzafirHost Remote Code Execution via JAR Signature Bypass

Source: https://junglewise.ai/threats/cve-2026-44088-krajowa-izba-rozliczeniowa-szafirhost-remote-code-execution-via  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-15. Updated: 2026-05-19  
License: CC BY 4.0 with a link back

CVE-2026-44088 · Severity: info · CVSS 8.6 · Published 2026-05-15

SzafirHost, a component used for managing electronic signatures, contains a vulnerability in how it verifies downloaded software updates or components. An attacker could trick the system into running malicious code by disguising it within a file that appears to have a valid digital signature. If exploited, this could allow an attacker to gain full control over the system, potentially compromising sensitive signing keys or disrupting business operations.

Vendors: [Krajowa Izba Rozliczeniowa](https://junglewise.ai/threats/vendors/krajowa-izba-rozliczeniowa).

## Quick answers

**Is CVE-2026-44088 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-44088 being exploited in the wild.

**How severe is CVE-2026-44088?** Informational severity, with a CVSS score of 8.6, published 15 May 2026.

**Which products and versions are affected?** Krajowa Izba Rozliczeniowa SzafirHost All versions prior to 1.2.1.

**Is there a fix for CVE-2026-44088?** A patch was published on 2026-05-15: Fixed in version 1.2.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-44088 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-44088?** Check whether you run Krajowa Izba Rozliczeniowa SzafirHost at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

SzafirHost exhibits a 'signature wrapping' or 'ZIP/JAR ambiguity' vulnerability. The application verifies the digital signature of downloaded JAR files using the JarInputStream class, which processes the file sequentially from the beginning. However, it subsequently loads classes using JarFile or URLClassLoader, which locate files by reading the Central Directory at the end of the ZIP archive. An attacker can craft a 'chameleon' file that contains a legitimate, signed JAR at the start but a malicious ZIP structure at the end. This causes the signature check to pass while the JVM executes the attacker's malicious classes. This issue is resolved in version 1.2.1.

## Affected products

- Krajowa Izba Rozliczeniowa (KIR) SzafirHost All versions prior to 1.2.1

## Timeline

- 2026-05-15: advisory: Advisory published by CERT.PL and NVD
- 2026-05-15: patched: Fixed in version 1.2.1

## References

- [https://cert.pl/posts/2026/05/CVE-2026-44088](https://cert.pl/posts/2026/05/CVE-2026-44088)
- [https://www.elektronicznypodpis.pl/](https://www.elektronicznypodpis.pl/)