Description
SzafirHost verifies the signature of the downloaded JAR file using class JarInputStream (reading from the beginning of the file), but loads classes using class JarFile/URLClassLoader (reading the Central Directory from the end). It can lead to remote code execution by allowing an attacker to combine a genuine, signed JAR file with a malicious ZIP file, causing the verification to pass but the malicious class to be loaded. This issue was fixed in version 1.2.1.
References (2)
Core 2
Core References
Third Party Advisory third-party-advisory
https://cert.pl/posts/2026/05/CVE-2026-44088
Product product
https://www.elektronicznypodpis.pl/
Scores
CVSS v4
8.6
EPSS
0.0044
EPSS Percentile
35.2%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-434
Status
published
Products (1)
Krajowa Izba Rozliczeniowa/SzafirHost
< 1.2.1
Published
May 15, 2026
Tracked Since
May 15, 2026