CVE-2026-44088

Remote Code Execution in SzafirHost

HIGH
8.6
CVSS Score
Published: May 15, 2026 at 08:48 AM UTC
Updated: October 26, 2026 at 02:10 PM UTC
1 product affected across 1 vendorSzafirHost

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Severity
HIGH8.6
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.2.1
Affected range stops below 1.2.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Third Party Advisory
Source: cverecord
https://cert.pl/posts/2026/05/CVE-2026-44088
Product
Source: cverecord
https://www.elektronicznypodpis.pl/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHCERT-PL
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-434

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