Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-42779

Severity CVSS v4.0:
Pending analysis
Type:
CWE-502 Deserialization of Untrusted Dat
Publication date:
01/05/2026
Last modified:
01/05/2026

Description

The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description:<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> Apache MINA&amp;#39;s AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed.<br /> <br /> <br /> <br /> <br /> The fix checks if the class is present in the accepted class filter before calling Class.forName(). <br /> <br /> <br /> <br /> <br /> <br /> <br /> Affected versions are Apache MINA 2.1.0

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:mina:*:*:*:*:*:*:*:* 2.1.0 (including) 2.1.12 (excluding)
cpe:2.3:a:apache:mina:*:*:*:*:*:*:*:* 2.2.0 (including) 2.2.7 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools