CVE-2026-42778criticalCWE-502

CVE-2026-42778: critical vulnerability in Apache MINA

Apache MINA: CWE-502 Deserialization of Untrusted Data (take 2)

Published · Updated

Follow this CVE+ Monitor Apache MINA+ Monitor org.apache.mina:mina-core

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.8epss 0.7%
The fix for CVE-2026-41409 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description: The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized was applied too late after a static initializer in a class to be read might already have been executed. Affected versions are Apache MINA 2.1.0 <= 2.1.11, and 2.2.0 <= 2.2.6. The problem is resolved in Apache MINA 2.1.12, and 2.2.7 by applying the classname allowlist earlier. Affected are applications using Apache MINA that call IoBuffer.getObject(). Applications using Apache MINA are advised to upgrade The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized was applied too late after a static initializer in a class to be read might already have been executed. Affected versions are Apache MINA 2.1.0 <= 2.1.110, and 2.2.0 <= 2.2.6. The problem is resolved in Apache MINA 2.1.12, and 2.2.7 by applying the classname allowlist earlier. Affected are applications using Apache MINA that call IoBuffer.getObject(). Applications using Apache MINA are advised to upgrade
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Apache Software Foundation · Apache MINA
Related CVEs — Apache MINA

In the same product, most dangerous first.

CVE-2024-52046CRITICALApache MINA: MINA applications using unbounded deserialization may allow RCEEPSS 24.4%CVE-2021-41973—Apache MINA HTTP listener DOSEPSS 4.6%CVE-2019-0231—Apache MINA SSLFilter security IssueEPSS 2.1%CVE-2026-42779CRITICALApache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCE (take 2)EPSS 1.2%CVE-2026-41635CRITICALApache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCEEPSS 0.6%CVE-2026-118636CRITICALApache MINA: Unsafe Deserialization (CWE-502) in JavaNativeMessageDecoderEPSS 0.6%