Code execution via unverified native library
Published Apr 2, 2026 · Updated Apr 2, 2026
Improper library validation in Krajowa Izba Rozliczeniowa SzafirHost before 1.1.0 allows remote attackers to execute code. When updating native libraries, the application saves downloaded DLL, SO, JNILIB, or DYLIB files in the user's temporary directory and executes them without checking a trusted hash or the vendor's digital signature. Exploitation requires attacker-controlled library content to be supplied through the initiating web page's SzafirHost update context, resulting in code execution with the application's user privileges.
Summary
What happened
Improper library validation in Krajowa Izba Rozliczeniowa SzafirHost before 1.1.0 allows remote attackers to execute code. When updating native libraries, the application saves downloaded DLL, SO, JNILIB, or DYLIB files in the user's temporary directory and executes them without checking a trusted hash or the vendor's digital signature. Exploitation requires attacker-controlled library content to be supplied through the initiating web page's SzafirHost update context, resulting in code execution with the application's user privileges.
The record
- CVE
- CVE-2026-26928
- Published
- Apr 2, 2026
- Updated
- Apr 2, 2026
- Vendor
- Krajowa Izba Rozliczeniowa S.A.
- Product
- SzafirHost
- Classifications
- CWE-354, T1129
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 2, 2026CVE publishedPublication date reported by the CVE source.
- Apr 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.1.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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